exposed to 接触…；暴露于…中
Europeans are often exposed to several different languages while growing up.
more to sth than meets the eye …不像看起来那么简单
There's more to bowling than meets the eye – it's actually very difficult to do well.
1.endangered adj. 濒临灭绝的
The snow leopard is endangered and may die out within a generation.
2.stock n. 储存；库存
The factory's stocks of raw materials are running low, so we should order more.
3.substance n. 物质