5411 篇
13916 篇
602415 篇
16343 篇
11779 篇
3948 篇
6564 篇
1255 篇
75732 篇
38184 篇
12196 篇
1674 篇
2874 篇
3423 篇
642 篇
1242 篇
1980 篇
4929 篇
3895 篇
5517 篇
[综合] [2025-06-17]
美国贸易财政双赤字是长期经济失衡的结果,再平衡阻力极大。美国贸易失衡源于美元作为储备货币的“特里芬悖论”。而特朗普政府尝试在维持美元霸权同时实现制造业复兴,这一矛盾目标使再平衡难度加大。纵观历史,美国政府支出呈“棘轮效应”,且自由裁量空间较小,而当前家庭财富对股市波动敏感度创新高,企业盈利高度依赖政府支出,使得财政紧缩面临空前挑战。两难处境可能迫使特朗普政府采取更为渐进和选择性的财政策略。同时,减税法案 2.0 可能将财政推向更加失衡的境地。
[化学原料和化学制品制造业] [2025-06-17]
Bitumen is a black, sticky, and highly viscous form of petroleum that is primarily used in road construction and waterproofing applications. It is composed of complex hydrocarbons and forms naturally or as a residue from crude oil refining. Bitumen acts as a binder in asphalt, holding aggregates together to form durable road surfaces. It has excellent waterproofing and adhesive properties, making it suitable for roofing and sealing products. The material softens when heated, allowing it to be spread and compacted, then hardens upon cooling, providing structural strength. Its performance is influenced by temperature and traffic load, so different grades are used depending on environmental conditions. Bitumen is recyclable, making it a sustainable choice in modern construction.
[科学研究和技术服务业] [2025-06-17]
Capillary electrophoresis equipment employs a liquid buffer as the medium for separation instead of a gel. This permits the proteins and nucleic acids to move more naturally and spontaneously. The demand for this equipment is increasing because of its high efficiency and resolution abilities. Capillary electrophoresis has many advantages over gel electrophoresis, such as the requirement for a small amount of sample, direct protein detection with no staining, more accuracy, and improved automation.
[汽车制造业,仪器仪表制造业] [2025-06-17]
A car security system is a comprehensive network of electronic and mechanical components which are designed to protect a vehicle from unauthorized access, theft, and vandalism. These systems typically include alarm sirens, immobilizers, keyless entry, central locking, motion detectors, and GPS tracking technologies. Car security systems function by detecting suspicious activities such as forced entry or vehicle movement and triggering alerts to deter intruders or notify the vehicle owner. As vehicle theft methods are evolving, modern security systems are being integrated with smart features such as biometric access, smartphone controls, and real-time tracking, making them essential for personal vehicle protection and insurance compliance.
[化学纤维制造业,化学原料和化学制品制造业] [2025-06-17]
Global Cathode Materials Market Size and Share Analysis - Growth Trends and Forecasts (2025 - 2030)
[电气机械和器材制造业,仪器仪表制造业] [2025-06-17]
A centrifugal chiller is a high-performance cooling system that removes heat from a liquid using the principle of centrifugal force. This technology works by using an impeller to compress refrigerant vapor, creating a pressure difference that facilitates heat transfer and effective cooling. One of the best features of centrifugal chillers is their efficiency. These systems are known for their ability to deliver large-scale cooling with minimal energy consumption, making them ideal for commercial and industrial settings. There are different types of centrifugal chillers, including air-cooled and water-cooled models, each designed to perform optimally under different environmental conditions and load requirements.
[化学原料和化学制品制造业,医药制造业] [2025-06-17]
Cementless total knee arthroplasty (TKA), also known as uncemented or press-fit TKA, is a surgical procedure in which the knee joint is replaced with implants that do not require bone cement for fixation. Instead, these implants are designed to encourage natural bone growth, allowing the bone to grow into the implant and secure it in place. This method aims to achieve a more natural and durable bond between the bone and the implant over time.
[农副食品加工业,食品制造业] [2025-06-17]
Caviar is a luxury food item that is usually consumed as an appetizer. Traditionally, roe from the wild sturgeon found in the Caspian and Black seas are termed caviar. The roe from other species of fish, such as paddlefish, salmon, and others, are considered substitutes for caviar. The main varieties of sturgeon that are harvested for caviar are Beluga, sterlet, Ossetra, and Sevruga. The fish eggs can be fresh or pasteurized. However, the pasteurized variety has lower economic as well as culinary value.
[农副食品加工业,食品制造业] [2025-06-17]
Global Cashew Market Size and Share Analysis - Growth Trends and Forecasts (2025 - 2030)
[医药制造业] [2025-06-17]
Canine arthritis treatment refers to the medical interventions and therapies used to manage and alleviate the symptoms of arthritis in dogs, a common condition where the joints become inflamed, causing pain and stiffness. Treatments typically include nonsteroidal anti-inflammatory drugs (NSAIDs), pain relief medications, joint supplements (like glucosamine and chondroitin), intra-articular injections, stem cell therapy, and physical therapy. The goal of treatment is to improve the quality of life of dog by reducing pain, enhancing joint mobility, and slowing the progression of the disease.