It's not for me to say why he left.

　　不適宜由我說出他離開的原因。

　　The university is on the left bank of the river.

　　大學在河的左岸。

　　The children are completely out of control since their father left.

　　這些孩子自他們的父親離開后就無法無天了。

　　It's one of the few countries where people drive on the left.

　　這是為數不多的幾個靠左行駛的國家之一。

　　Very young children should not be left to play without supervision.

　　不能讓幼兒在沒人照看的情況下獨自玩耍。