Umpiring
vt. 为…做裁判（umpire的现在分词形式）
🗣️ 情景例句
The cloning of human organs is controversial.
人类器官克隆是极具争议性的。
Will you please lock the door when you leave?
请您当你离开时，锁门？
It looks like we have problem with the shipment.
货有问题哦。