有危險的用法和樣例：
例句
-
一有危險跡象，潛艇就會潛入水中。
At the first sign of danger the submarine will submerge. -
做個消防隊員有時候會有危險。
Being a fireman sometimes may be dangerous. -
刀傷已穿透到了骨頭，她的生命有危險。
The knife wound penetrated to the bone, and her life was in danger. -
簡正有危險成為一個嗜酒者，因此她到一家特殊的小型療養院去戒酒。
June was in danger of becoming an alcoholic and so she's gone to a special nursing home to dry out.
