他们一发狠，三天的任务一天就完成了。

With a determined effort, they finished the three-day task in a single day.

《新英汉大辞典》

youdao

第三个目标将在嫦娥5号任务中实现，该任务将在今年年底前完成。

The third will be achieved during the Chang'e 5 mission, which is set to take place before the end of this year.

youdao

Typically--I don't know for those particular children, but typically on those tasks three-year-olds and young four-year-olds tend to fail, and around the age of four or five kids tend to succeed.

我不太了解那些特定儿童的情况,但一般来讲,三岁和刚进入四岁的儿童,通常会在这些任务中失败,而四岁或是五岁左右的儿童则通常会成功

耶鲁公开课 - 心理学导论课程节选

Three-year-olds find this difficult.

三岁大的儿童会觉得这个任务很难

耶鲁公开课 - 心理学导论课程节选