1. 名詞
   不可數名詞: 預防, 謹慎
   警惕
   可數名詞/
   複數為"precautions":
   預防措施
   a precaution against ...(問題、危險等):
   預防...的措施
   

   同義字詞
   caution,fail-safe,palladium,preventive,safeguard
   

例句

1. We will take every precaution with him.
2. As a precaution , all items were recalled.
3. Economic incentives to promote precaution .
4. The floodgates were raised as a precaution .
5. The password change was purely a precaution .
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