重點(diǎn)講解：
1. piece together 拼湊出（真相）；
They've pieced together his movements for the last few days before his death.
他們已理清了他去世前幾天的活動(dòng)情況OYvA[GRoFM。
2. wipe out 摧毀；毀滅；使滅絕；
The spill could wipe out the Gulf's turtle population.
這次原油泄漏可能會(huì)使波斯灣的海龜滅絕wcrX3Pe|Dmw%KqPQZ[y。
3. pin down 確定；證實(shí)；
It has taken until now to pin down its exact location.
直到現(xiàn)在才確定了它的準(zhǔn)確位置Ede=4VMrhfeNsFrubG。
4. shed light on 使（某事）顯得非常清楚；使人了解（某事）；
A new approach offers an answer, and may shed light on an even bigger question.
新的方法提供了一個(gè)答案，并且可能讓人們對(duì)一個(gè)更大的問(wèn)題有進(jìn)一步的了解O@Yys64.%+yNy。