prevent的'用法例句
1. A dentist may decide to extract the tooth to prevent recurrent trouble.
牙医可能会决定拔掉那颗牙，以免反复发作。
2. The security zone was set up to prevent guerrilla infiltrations.
设立了安全区以防止游击队员的渗入。
3. Smear Vaseline on to your baby's skin to prevent soreness.
给孩子皮肤上抹些凡士林以防止肿痛。