?当心

watch out look out; be on one's guard 注意；当心 Watch out for cars when you cross the road. 过马路时当心车辆！

?注意

watch h out look out; be on one's guard 注意；当心 Watch h out for cars when you cross the road.

?戒备着

... on guard 值班 be on one's guard 戒备着 put someone on guard 劝某人警惕,让某人提...