消化道是一条穿过整个生物体的管道。
婚姻生活是否幸福，完全是个机会问题。
Small-scale farmers are the backbone of the aquaculture industry; empowering them is crucial for global food systems.
团队的力量在于思想和经验的多样性。
Economics is the study of how societies use scarce resources to produce valuable goods and services and distribute them among different individuals. If we think about the definitions, we find two key ideas that run through all of economics: