重点讲解：
1. as to
关于…；
例句：Local inhabitants haven't the slightest doubt as to who is the rightful owner.
当地居民对谁是合法所有者没有丝毫疑问_S6a~jZSfnd0R*A_@UY!。
例句：He is in no doubt as to what is needed.
他很确定需要什么64^iQT&zm=!.1l。
2. be composed of
组成；构成；
例句：The sea water is mainly composed of water and salt.
海水主要由水和盐组成+9r!0jH19^。
例句：All animals and plants are composed of cells.
一切动植物均由细胞组成YYM@F0oha^)。
3. be similar to
相像的；相仿的；类似的；
例句：Mary's symptom is similar to Joseph's in some way.
玛丽的症状在某些方面和约瑟夫的类似WVMsv9)3#fc@+。
例句：I came across a sentence similar to this one in structure.
我碰到过在结构上与这个相似的句子vIlIWP!P).]EYr%wZqr_。
4. prey on
捕食；
例句：The effect was to disrupt the food chain, starving many animals and those that preyed on them.
后果是打断食物链，使许多动物和捕食它们的动物饿死JQ;pEhc_)0|j]5R。
例句：Stronger animals prey on weaker ones.
弱肉强食@AD!(SPr%;=Fpg#0。
5. protect from
保护；防护；
例句：He raised his arm to protect his child from hurt.
他伸出手去，保护他的孩子免受伤害I)@I(xZNE)Y6igL)p。
例句：Such laws could protect the consumer from harmful or dangerous remedies.
这样的法规可以保护消费者免受有害或者危险药品的威胁|UfP=p*1~RDbq4kNa(。