a well一口井。well：n. 井，源泉，楼梯井。
作动词，well out 涌出,流出flow freely，well over溢出overflow (the edge of a container)，well up涌出 rise。
【例句】
She has the well of enthusiasm.
她是热情的源泉。
Tears welled up in her eyes.
她眼泪盈眶。
【例句】
She has the well of enthusiasm.
她是热情的源泉。
Tears welled up in her eyes.
她眼泪盈眶。
