Nonremunerative
无偿的, 不合算的
🗣️ 情景例句
How long does it take?
要花多久时间？
When I had a rest, what were you doing?
当我休息时，你在做什么？
Spiders are busy for at least half the year in killing insects.
蜘蛛至少有半年在忙于吃昆虫。