英语语法分析

It is usual to tip waiters, porters, guides and drivers.

给服务员、行李搬运工、 导游和司机小费是惯例。

Archival research confirms that Europeans were not merely dependent on the work of porters, soldiers, translators, cooks, pilots, guides, hunters and collectors, they also relied on local expertise.

档案研究证实，欧洲人不仅依赖于搬运工、士兵、翻译员、厨师、飞行员、导游、猎人和收藏家的工作，他们还依赖于当地的专业知识。

Two strong porters came up the Alp, each carrying on his back a fresh, white bed.

两个身强力壮的壮实的脚夫走上高山，每个人都背着一张崭新的白色床。