Among his most valuable works are the Novum Organum and the Advancement of Learning.

I feel a twinge in my back now and again.

我不时感到背痛.

Only now and again , violent little shudders would come over her , out of her subconsiousness.

只是在偶然的时刻, 在她的潜意识中会产生出少量激动的震动.

We've got little bits, but it's only now and again, and never current stuff.

我们搞到了一点点儿, 但只是偶尔能搞到, 而且从来都不是当前情况.

She would hold her course all day, with a finger to the wheel now and again.

只要不时用个手指去碰一碰舵轮,她就会整天按照航线行驶.

Now and again the hunter can hear a long-draw dolorous whine of some unseen coyote.

猎人不时能听见某只看不见的小林狼发出的拖长的哀嚎.

I only go there now and again.

我只是偶尔到那里去.

I'll admit that now and again he had a sort of tub-thumping eloquence.

我承认,他不时地表现出一种慷慨激昂的口才.

Now and again the wolves, in packs of two and three, crossed his path.

那些狼, 时常三三两两地从他前面走过.

Now and then the thoughtful ones presented me with cigarettes, or a little pin money.

有时几个考虑周到的人也会给我几支香烟或一点零花钱.

Now and then we heard shots in the woods.

我们不时听到森林里传来的枪声.

The minister preaches a sermon now and then.

牧师不时地讲道.

Anybody you call between now and then is your responsibility.

如果你告诉过任何人,发生了什么都会是你的责任.

Now and then I have tested my seeing friends to discover what they see.

我不时地询问过我的能看见东西的朋友们,以了解他们看到什么.

And to be fair, it does happen now and then.

公平地说, 这种事情也时有发生.

As he marks down the prices, he stops now and then to pack things into a large bag.

他一边抄价钱，一边不时停下来往一个大袋子里装东西。

Don't neglect paying him a visit now and then.

别忘了时常去看看他.

Some people act the fool now and then.

有些人时常装傻.

Now , now, stop playing with the ball inside the house!

嘿, 别在屋子里玩球了.

"I figure it'sall over."—"Now, now. You did just fine."

“我想都过去了。”——“好啦，好啦，你做得还不错。”

Sorry, he isn't in now . Now please tell me who is speaking now?

对不起, 他现在不在家. 请问您是谁?