He twiddled with the knobs of the radio.

他旋弄着收音机的旋纽.

I sat there and twiddled my thumbs.

我坐在那里，百无聊赖地玩着手指头。

The log twiddled round and round in the river.

那根圆木在河水中转来转去.

He kept me waiting for nearly an hour while I twiddled my thumbs.

他让我等了差不多一个小时,我闲得无聊.