1. 守恒：conservation of momentum 动量守恒 | conserved 守恒 | consistency condition 相容条件

2. 保守的：conservative substitution 保守(性)替换,保存性置换[相似的氨基酸残基之间的替换] | conserved 保守的 | conserved sequence 保守序列

3. 保存：汇编Compiled | 保存Conserved | 收集Gathered

4. 守恒的：§4.5 Motion of the Center of Mass(质心的运动) | conserved 守恒的 | isolated system 孤立系统

adj

1. protected from harm or loss