tower crane的用法和樣例：
例句
- A tower crane keeled over and crushed some temporary buildings, but fortunately nobody was hurt.
塔吊突然倒塌，砸壞了一些臨時(shí)性建筑物，但幸好沒(méi)有人員傷著(zhù)。 - But it was too late and the wirerope was broken!A large and heavy iron pot fell down from the crane,the pot stuck right on my father's head,he was knocked out immediately.
但是太晚了，塔吊的鋼絲繩斷了，一個(gè)很重的鐵料斗從塔吊上掉下來(lái)，這個(gè)鐵斗正砸在我父親的頭上，他當即被砸暈在地。
