substitute teacher的用法和樣例：
例句
- When their teacher was absent and they had a substitute,the children kicked over the traces.
當他們的老師不在，來了一位代課教師時，孩子們都不聽話了。 - Fortunately, Kansu provincial party secretary Su Rong also issued written orders that the problem of substitute teachers must be solved.
幸好甘肅省委書記蘇容也在後來批示要求解決代課教師問題。
