This is the Sierra mid-summer thunder-storm reduced to its lowest terms.

这是塞拉利昂盛夏的雷暴降到最低的一次。

Some of these interesting dwarfs have only one catkin—willow bushes reduced to their lowest terms.

这些有趣的矮人中有一些只有一种柔荑花草——缩减到最低限度的柳树丛。