Did you see the length of his hair?

　　你看見他頭發(fā)有多長嗎？

　　This room is twice the length of the kitchen.

　　這個(gè)房間的長度是廚房的兩倍。

　　The snake usually reaches a length of 100 cm.

　　蛇一般長達(dá)100厘米。