重点讲解：
1. be detrimental to 有害的；不利的；
Poor eating habits are detrimental to health.
不良的饮食习惯对健康有害bkrw2,+8ueajrPU@~2O-。
2. be exposed to 使暴露于（险境）；使遭受（危险或不快）；
They were exposed to radioactive fallout during nuclear weapons tests.
在核武器试验中他们暴露在放射性尘埃之下2G1yH7Jl&Fw8*#9&W。
3. at the end of 在…的结尾；
It was a rushed decision made at the end of the meeting.
那是会议结束时匆忙作出的决定h]qAj=a3WcRR。
4. what's more 更有甚者；更为重要的是；此外；
You should remember it, and what's more, you should get it right.
你应该记住它，更重要的是，应该正确理解它Se*7W+Q;~cu*.d|^[b4。