重点讲解：
1. depend on 取决(于)；有赖(于)；
The risk and severity of sunburn depend on the body's natural skin colour.
晒伤的风险和严重程度取决于人体的自然肤色v636xW_oH;cAm。
2. shut down (使)(工厂、公司等)关闭,歇业，停业；
The Polish market in Berlin was considered unsightly and shut down.
柏林市内的波兰市场因为被认为有碍观瞻而关闭了O*Hg%qEn*W6。
3. one another 互相；
We all try and help one another.
我们都尽力互相帮助p0A1y^6B]Cd#!。
4. get back to 重新开始，继续；
Then life started to get back to normal.
随后生活又恢复了正常!-c49~]Q|V|A.%d58。