You could do this with natural light — by penciling in some outside time — or with bright light therapy.

你可以安排一些户外时间，照照自然光，或进行强光疗法。

The only clouds were a few faint flossy pencilings like combed silk.

唯一的云彩是一些微弱的绒毛铅笔， 像精梳的丝绸。