专家为各位考生整理了雅思词汇：prior to供考生们参考使用。
prior to
1. 在......之前
2. 在。。。之前
3. 在前,居先
4. 较早的,较重要的
5. 在... 之前
例题：
Although the growth in Canada‘s population had slowed down by 1966 (the increase the first half of the 1960’s was only nine percent) , another large population wave was coming over the horizon. It would be composed of the children who were born during the period of the high birth rate prior to 1957.
The phrase “prior to” is closest in meaning to which of following?
(A) behind
(B) since
(C) during
(D) preceding
答案：D
