serv后缀的单词5个

　　Help to conserve energy by insulating your home.

　　对房屋做隔热处理来帮助节约能源。

　　We should conserve oil and gas by making full use of other energy sources

　　我们应该通过充分利用其他能源来节省石油和天然气。

　　The mixed forest is cut commercially but is also carefully conserved to look good.

　　这片混合林用于商业砍伐，但与此同时也进行妥善维护以保持景观。

　　They observed how the parts of the machine fitted together.

　　他们观看了机器零件的组装过程。

　　He was observed to follow her closely.

　　有人看到他紧跟着她。