Patrolling
vt.& vi. 巡逻, 巡查（patrol的现在分词形式）
🗣️ 情景例句
Well, I've got an appointment at the hospital.
好啦， 我在医院有事。
We are in great need of Grade A.
我们急需一等品。
Long car journeys are even less pleasant, for it is quite impossible even to read.
乘汽车作长途旅行则更加不舒服，因为连看书都几乎不可能。