left behind的用法和樣例：
例句
- If you don't keep up with the times, you'll get left behind.
如果你跟不上時代，就會被時代甩在後面。 - If we let the fastest runner make the pace the others will be left behind.
如果我們讓跑得最快的人領頭跑，其他人就會跟不上。 - The rubbish left behind by the Cup Final crowd beggars description.
觀看錦標賽的觀眾們丟下的廢物，實非筆墨所能描述。 - Come on quick or we'll be left behind.
快，不然我們就掉隊了。
