任务完成的英文：
n. mission completion

参考例句：

It was my brainchild and I'd like to see the job through to the end.
这是我的设想,因而我想看到任务完成。

mission是什么意思：
n. 使节团；大使；使命，任务；使命，天职
v. 派遣；传教

But this was his mission.
但是，这就是他的使命。

take up (=assume) this mission
承担这使命

a permanent diplomatic mission
常驻外交使团

Mission accomplished. Booyah!
任务完成了。太好啦！

The priest is missioning the believers.
牧师正在给信徒布道。

completion是什么意思：
n. 完成，结束，实现

Complete power corrupts completely.
绝对的权力造成绝对的腐败。

completive interjection
补足叹词

The task is complete.
任务完成了。

It is completely unverifiable.
这个完全无法核实。

It is the first complete revision of the dictionary since it was completed in 1928.
也是该词典于1928年编纂完毕后的第一次完整的修订。