英语语法分析

In America, I thought blacks were janitors and laborers.

我一直以为在美国黑人都是看大门的和干体力活的。

Others work as cooks and janitors, in restaurants or as nannies at homes.

其它的工作也有，例如饭店的厨师和保安或者是家庭保姆。

Building and Ground Maintenance - cleaning staffs, janitors, landscapers, pest control workers.

大楼和地面维护——清洁工、门卫、庭园设计师、害虫防治人员。