I'll mount guard over the luggage while you get the ticket.

你去买票，我来看管行李。

《新英汉大辞典》

To on guard groom with what the sailor before mount guard has various and professional knowledge and technical ability, extremely urgent.

对在岗的和上岗前的船员进行各级专业知识和技能的培训，迫在眉睫。

youdao

Financial teller: 1, above two years is related the work experience, have the mount guard card.

财务出纳：1名，两年以上相关工作经验，有上岗证。

youdao

In Haiti in 1994, President Clinton used the Coast Guard to mount under United Nations auspices a military blockade of a foreign country.

ECONOMIST: The Coast Guard: Keeping all channels open | The