如果有个心烦意乱、忧心忡忡的母亲，一个完全无用的角色，那就是我。

I became a distraught, worried mother, a useless role if ever there was one.

《柯林斯英汉双解大词典》

坦白：我也携带美国运通白金卡，也便于取得相应的优惠。在美国境外使用此卡完全无用。

Confession: I also travel with an Amex Platinum card so I have access to their benefits. Completely worthless card to actually use for transactions outside of the USA though.

youdao

说点题外话，我承认这是一个完全无用的程序，跟我们之前写的两个程序一样,我们为什么需要写个程序来解决这个数学运算呢？

Now as an aside, I'll admit this is a completely useless program, much like the first couple of ones we did because why would you write a program just to solve this?

youdao

Now as an aside, I'll admit this is a completely useless program, much like the first couple of ones we did because why would you write a program just to solve this?

说点题外话，我承认这是一个完全无用的程序，跟我们之前写的两个程序一样,我们为什么需要写个程序来解决这个数学运算呢？

哈佛公开课 - 计算机科学课程节选