preserve的用法：
用作動(dòng)詞 (v.)
用作及物動(dòng)詞：
S+～+ n./pron.
We must preserve our natural resources.
我們必須保護(hù)自然資源。
The ship is equipped with special refrigerating devices to preserve food.
船上有特設(shè)的冷藏設(shè)備,用來保存食物。
It was his firm conviction that every effort should be made to preserve world peace.
他堅(jiān)信應(yīng)盡一切努力維護(hù)世界和平。