琢磨

The visitor can ponder over the boomerangs used by aborigines at the time of Cook.

来访者可土著人在库克时期用的回飞镖。

I’ve been mulling over what you said last night.

我昨晚一直在你的话。

I can’t fathom her out — she says one thing then does another.

我透她─她说的是一套，做的又是一套。