Since 3 duration, the day after every molted silkworm, once a day or once every other one day.

从三龄起，每龄起蚕后第二天，每日一次，或隔日一次。

youdao

Since 3 duration, the day after every molted silkworm, once a day or once every other one day.

从三龄起，每龄起蚕后第二天，每日一次，或隔日一次。

youdao