Let the area warm completely before applying ice again, in order to prevent frostbite.
再次敷上冰块前，患处应完全恢复到温暖的状态，避免发生冻伤。
The plant was kept in a glass case on deck to keep it warm and prevent damage from salt water.
为了给咖啡树保暖，并防止海水的损害，他把树安放在甲板上的一个玻璃箱里。
You'd better bring more warm clothes with you to prevent you from getting cold.
你最好多带一些保暖的衣服，以防感冒。
注意保暖，避免受凉。
注意保暖，避免受凉。
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