Rock drill
n. 鑿石器; 鑿巖機
?? 詞語組成解析
rock
[rɑk]
n. 巖石，石頭;搖滾樂;棒糖;<非正式>寶石（尤指鉆石）;
v. 搖晃;搖動;震動;
vi. 演奏搖滾樂;隨搖滾樂起舞;
drill
[dr?l]
n. 操練;鉆頭;軍事訓練;（應對緊急情況的）演習;
vt.& vi. 鉆（孔）;打（眼）;操練;訓練;
vt. 作…演習，操練;
??? 情景例句
We've known each other since we were children.
我們從小就認識。
Can I be sure of a profit if I invest?
我要是投資，肯定能獲利嗎？
It makes it easier for us when we get the order on the dock.
這樣我們在碼頭提貨時比較方便。