besetzt (adj)

attended (adj)

busy (adj)

But as much as he would like to take more time out for his studies, his other job keeps him very busy.

As a result, it keeps supplies rolling in smoothly from the flow racks, even when things get really busy.

manned (adj)

That means our customers can leave the machine running unmanned.

The work bench must be treated as a dynamic position that is manned by a moving human employee.

occupied (adj)

参加 (adj)

已占用的 (adj)

忙碌的 (adj)

有人操纵的 (adj)