She felt nervous, increasingly lacking in confidence about herself.
她感到緊張，對(duì)自己越來(lái)越缺乏信心。
These tasks were repetitive, lengthy and lacking any intrinsic interest.
這些作業(yè)重復(fù)冗長(zhǎng)，沒(méi)有什么意義。
What was lacking was a way of giving such images permanent form.
真正缺少的是將這些影像永久保存下來(lái)的方法。