微笑不用花费分文。

Smile doesn't cost a cent.

youdao

现在所有的建筑都必须是无障碍的，如果拆除没有太大困难或不用花费过多的话，现有的设施必须拆除障碍。

All now buildings must be made accessible, and existing facilities must remove barriers if the removal can be accomplished without much difficulty or expense.

youdao

在这些时候，创造是不用花费力气的。

In these moments, creation is effortless. There’s no strain, no effort, no real work.

youdao

So, how many distinct, so again, we're talking about distinct kinetic energies, a spectrum for the element hafnium, 72 and I'll tell you here that it has a z of 72, so you don't have to spend two minutes searching your periodic table.

好，有多少分立的……还是一样，我们讨论的还是不同的动能，铪元素的光谱中出现，而且我来告诉大家铪的原子序数是，这样你就不用因为在元素周期表中找它,而花费两分钟的时间了。

麻省理工公开课 - 化学原理课程节选