By mapping out California's faults,通過繪制加利福利亞的斷層

map out:詳細制定； 籌劃

I like to map out the whole week in advance.

我喜歡預先把整整一周的事作出安排。

Roger hopes to pick up a small sign羅杰希望能通過發現一個細微跡象

pick up:收集

He picked up news from all sources.

他從各種渠道收集消息。

常用短語:

pick up the gauntlet應戰(護衛)

pick up with sb.結識某人

pick up on 與 ... 熟悉起來

how tiny slips in one place could lead to huge earthquakes somewhere else.一個地方的微小滑動是怎么能導致其他地方一場大地震的

lead to:導致，引起

Mass unemployment may lead to social upheaval.

大批失業會導致社會動亂。

Smoking can lead to lung cancer.

抽煙可能導致肺癌。

常用短語:

All roads lead to Rome.條條大道通羅馬。

lead to much有什么重要結果,有了不起的收獲