1·He leaned against the tree quietly to conserve strength.
他静静地靠在树上以节省体力。
2·These are evident in the fish’s speed (up to 70kph) and extreme swimming efficiency, evolution having honed its body to reduce drag and thus conserve strength during transoceanic migrations.
明显的是鱼的速度（最多70kph ）和极端游泳效率，其身体结构的进化可以减少阻力，从而在海洋移动中保存了体力。
3·In particular, richer agents influence a larger number of agents with a higher strength, they do not account strongly for market behavior, and they aim to conserve their opinion.
特别地，那些更富裕的经纪会以更大的强度去影响更多的经纪，但它们并不构成市场行为的主体，而是倾向于保持自己的观点。