You can't lay down hard and fast rules.
规则不能定得太死。
On the bed lay Peter fast asleep.
床上躺着熟睡的彼得。
Seventy million years ago, India lay south of the Equator. It was headed north, though, and by continental-drift standards, it was moving fast.
七千万年前，印度大陆位于赤道之南，按照大陆漂移学说的标准，印度大陆头朝北快速移动。
Right. Got it. I could stand to lay off the fast food anyway.
恩，有办法了。不管怎样我可以不去吃快餐。
Yet many managers are under pressure to turn their firms' fortunes round fast. Hence the predilection for swift and sizeable lay-offs.
而且很多管理人员在压力下需要加快本公司的资金周转，因此产生了迅速且大规模的裁员行动。
Its latest recommendation, however, may be its most useful yet: Lay off the fast food.
但最近的一条也许是所有建议里面最有用的了：别吃快餐了。
The derivations lay a good foundation for the efficient evaluation of Green's functions and the fast solving of scattering problems by the method of moments (MoM).
这些工作为格林函数快速计算方法的实现以及积分方程的矩量法高效求解打下了基础。
So she covered herself up comfortably, and lay there till she fell fast asleep.
于是她把自己盖得舒舒服服得，躺在那儿很快睡着了。
This study lay a firm foundation not only for preparation of antiserum later and detection BBTV fast and effectively, but also for plant anti-virus gene engineer and anti-virus breeding.
这为以后制备特异性抗血清，开展BBTV的快速、有效的检测奠定了基础，同时也为植物抗病毒基因工程和抗病育种研究做好了一定的前期工作。
The Wolf lay down in the green meadow under a tree and fell fast asleep.
大野狼躺在一棵树下的绿色草地上便呼呼大睡了。
Traditional resource sharing systems, such as MOSIX, expect to lay on top of a fast and static communication channel, and cannot function on top of a volatile and slow wireless links.
传统的资源共享系统，比如MOSIX，期望建立在快速和静止的通信信道之上，并且不能在不稳定和慢速的无线链路下工作。
Before the enemies lay down their arms, we must hold fast to our guns.
在敌人放下武器以前，我们必须紧握手中枪。
So the hare lay down under a tree and was fast asleep.
所以野兔躺在一棵树上，睡得很香。
After the test, I was so relaxed. I lay on the carpet. I said, "Oh! This test was very fast."
考试后我很放松，我躺在地毯上说：“这个考试好快哦。”
You can not lay down hard and fast rules .
规则不能定得太严太死。
The kid lay down on the couch and was soon fast asleep.
这孩子躺在沙发上很快就睡着了。
He does not give milk, he does not lay eggs, he is too weak to pull the plough, he cannot run fast enough to catch rabbits.
那些家伙产不了奶，也下不了蛋，瘦弱得拉不动犁，跑起来也是慢吞吞的，连个兔子都逮不住。
Its advantages lay in that it can give stability margin and has fast calculation speed.
其最大的优点是能够给出稳定裕度并且计算速度快。
I really need to lay off fast food.
我真的不能再吃快餐了。
We stuck hard and fast on the rocks in the middle of the river, and lay there four days.
我们把船牢牢地拴在河中央的礁石上，并停在那里长达四天之久。
We stuck hard and fast on the rocks in the middle of the river, and lay there four days.
我们把船牢牢地拴在河中央的礁石上，并停在那里长达四天之久。
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