And again, we must think of the cost.
再说，我们必须考虑成本。
Now and again, he disappeared only to reappear once more.
他时而消失，时而又出现。
I give it a polish now and again.
我不时把它擦亮。
We see each other every now and again.
我们偶尔相见。
We left the road, and again bumped over the mountainside.
我们离开公路，又一次在山坡上颠簸行驶。
Every now and again she checked to see if he was still asleep.
她隔一会儿就看看他是否还在睡觉。
He would go over his work again and again until he felt he had it right.
他会反复检查他的工作直到他觉得准确无误为止。
She badgered her doctor time and again, pleading with him to do something.
她一再纠缠医生，恳求他做点什么。
He had asked her once again about her finances. And again she had equivocated.
他又问了一次她的财务状况。她再次含糊其辞。
I love listening to my friends talk and laugh, throwing in a zinger of my own now and again.
我喜欢听我好友说说笑笑，不时地插入几句我自己的巧言妙语。
You've lied to me again and again.
你一次又一次地骗我。
他们一而再再二三的撒谎。
I reminded her time and again yesterday.
我昨天一次又一次地提醒她。
Again and again, he darted in and pricked.
他一次又一次地冲进来刺他。
They try again and again until they succeed.
他们一次又一次地尝试，直到成功。
He chalked his billiard cue again and again.
他一再用白垩粉擦他的球杆尖。
They fall, somersault, and get punched again and again.
他们一跃而下、连翻筋斗、一次次冲锋。
They could be used again and again for different books.
它们可在不同书籍上反复利用。
First, I played the piano again and again and I got better.
首先，通过一次次的演奏钢琴，我的技艺有了提高。
Unexpected disasters (灾难) would hit the earth again and again.
难以预料的灾难将一次又一次席卷地球。
I could return to them again and again with the flip of a page.
我可以通过翻动书页一遍又一遍地跟他们重复。
I get sick of sitting there and doing exercises again and again.
我厌倦了坐在那里，一遍又一遍地做练习。
They tried again and again in the field, no matter how hard it was.
他们在田里一次又一次尝试，不管有多难。
But that doesn't mean you don't want a doughnut every now and again.
但这并不意味着你不想时不时地吃个甜甜圈了。
He explained again and again in order to make what he did understood.
他一遍又一遍地解释，为的是让人理解他的所做所为。
After you tried again and again and again, you understood how to walk.
在你试了一遍又一遍之后，你知道如何走路了。
A few bats skimmed his nose now and again and scared him half to death.
几只蝙蝠不时掠过他的鼻子，把他吓得半死。
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