in advance
to guard against
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→yu4fang2 • yùfáng
to prevent
prevent, prevention, to guard against, guard against
常 洗手 可以 预防 感冒。
Washing your hands often can prevent colds.
你 知道 如何 预防 火灾 吗？
Do you know how to prevent fires?
这些 措施 能 预防 事故。
These measures can prevent accidents.