“work up to”简单造句，work up to造句子

They work up to 13 hours a day, live in cold, dirty, overcrowded dormitories and eat poor food.

If I break you in, I'll be doing plenty of your work at first. Suppose you begin at thirty, an 'work up to the forty.

We will construct under the practicable state and quality requirement of client. The qualified percent of unit work up to 100%.

Ren said he never saw Fang beating a worker, but added: "He was not a kind person.... Maybe if they didn't work up to a certain level, there would be no food."

Working conditions in factories at the time were appalling—children aged five or six would work up to 15 hours a day.