adj.小心的;仔细的;谨慎的;节约的;
例句:
Be careful when you back into the garage, the doorway is very narrow.
你倒车入库时要小心,门道很窄.
The captain is careful for the safety of the passengers.
船长关注旅客们的安全.
If it's lost, it's lost. Just be more careful from now on.
丢了就丢了吧, 以后小心点.