guān / chá / cán / mián / de / shí / jiān / kě / yǐ / bāng / zhù / pàn / duàn / cán / de / shēng / zhǎng / qíng / kuàng

观察蚕眠的时间，可以帮助判断蚕的生长情况。

Observing the timing of a silkworm's resting period can help assess its growth.