重点讲解：
1. pick up 接收到（信号或声音）；
The crew of Philante picked up a distress signal from the yacht Sans Peur III.
“菲蓝特”的船员接收到了“无畏者三号”游艇发出的遇险信号lW6q~4kA0T。
2. along with 与…一起；
An oil seal was replaced, along with both front wheel bearings.
换了一个油封和两个前轮轴承^Lj(Rsmc0h;]9F]k.。
3. pin down 确定；证实；
It has taken until now to pin down its exact location.
直到现在才确定了它的准确位置G%Rj~++.GF=HeyOua6。
4. compared to 与…相比；和…比起来；
Standards in health care have improved enormously compared to 40 years ago.
与40年前相比，卫生保健的水平得到了极大提高5DGj#VI6VK,h.。