短语词组短語Boat rock drill 鑽巖船charter boat drill 救生縯習brear end boat drill 救生縯習boat drill signal 救生縯習信號Evacuation and Boat Drill 撤離和救生艇縯習life boat drill 沉船法則drill boat 鑽探船;鑽探船教練船;教練艇Rock drill boat 鑽巖船drill l boat 鑽探船 返回 boat drill