没有成本

for nothing───免费；徒然

it's nothing───小事情

cost keeping───成本核算

cost saving───n.节省费用；[会计]成本节约

cost-cutting───成本削减

costeaning───v.井探（costean的现在分词）

do-nothing───什么也不做，无所事事

last thing───临睡前的最后一件事

to stop at nothing───无所事事

A smile costs nothing, but gives much.───微笑毫不费力，却能让人受益良多。

It costs nothing to make a pill.───现在制造药片不需要成本。

Civility costs nothing.───礼貌不须什么代价。

"Refusing to drink costs nothing to your health, as well your festive mood on holiday, " he said.───他说，“禁酒对您的健康毫发无损，也能让您在节假日您保持愉悦的心情”。

A smile costs nothing, but gives much. It enriches those who give it. It takes but a moment, but the memory of it sometimes lasts forever.───微笑不费分文，受者得益良多，施者更加富有。弹指瞬间事，它有时令人终身难忘坏。

A free-range hen scratching around might lay one or two eggs a week. Feeding her costs nothing, giving a net gain of 50-100 eggs a year.───散养的鸡四处抛食，一个星期可以下1-2个蛋，饲料成本为零，一年可以净得50—100个鸡蛋。

It is often said that politeness costs nothing. In fact, it seems that a little more courtesy could save businesses ? 5billion every year.───俗话说“礼多无所失（却得到一切）”。事实表明，对员工以礼相待每年能为公司节省50亿英镑的支出。

It costs nothing to hide behind this defense, and who wants to admit that they were asleep at the wheel or not looking out the window?───藏在这道防线后面不会付出任何成本，而谁又愿意承认自己开车时在方向盘上睡着了，或者根本没有观察窗外呢？

Courtesy costs nothing but it gains everything.───礼貌无所费，却赢得一切。

Once again, however, it costs nothing to try an idea out on the screen.

If they adopted that system which costs nothing you would avoid patients' frustration and give the health service a better name.

Asking costs nothing.

Remind yourself that relaxation costs nothing but can pay dividends in better health and in better speechreading.

Politeness costs nothing and gains everything. 

Civility costs nothing.

Keeping all the food in a warehouse costs nothing.

Politesse costs nothing and gains everything.

Courtesy costs nothing.