Not a single day has been wasted, though I can never tell when knowing the population of Nepal might prove useful.

Stability Analysis of a Kind of Harvest Model for the Population of a Single Race

一种单种群收获模型的稳定性分析

A study on the population of yellow& breasted bunting at Changbai Shan

长白山黄胸鹀种群生态的初步研究

Vicissitudes of the Population of China Tartar Nationality and the Present Situation of Population Distribution

中国塔塔尔族人口规模的变迁和人口分布现状

The population of hydroxyl rotation level and it's influence to LIF

激光诱导荧光法测量OH自由基中激光产生的OH自由基转动能级布居及其对测量的影响

With the population of Digital TV, high definition television receiver will have excellent prospect in the future.

随着数字电视在我国的普及，高清电视接收机将会有广阔的市场前景。

Humans Dental caries in the population of the Neolithic Age

新石器时代人牙齿的龋病状况分析

Harvest Model and Its Stability Analysis for the Population of a Single Race with Age Group

基于年龄分组的单种群收获模型及稳定性分析

The population of the adult dairy cow is 400 for each designing farm;

奶牛场的规模为成乳牛400头的牛场一座；

The population of the Hakka accounted for only about 10 per cent of the total population of Penang Chinese.

客家人的人数，一直都只占华人人口的10%左右。

China is really between a rock and a hard place when it comes to its water sector.

在谈到水这个问题时，中国确确实实成了一个不好的地方。

The third act throws in more obstacles to place the protagonist between a rock and a hard place and then resolves all of the outstanding issues.

最后一幕则设置更多的障碍，将主角置于困境之中，并在最后解决所有的重大问题。

You were really between a rock and a hard place when you had to choose between your career and your relationship.

当你不得不在事业和感情之间做出选择时，真的是进退两难。

When you are stuck between a rock and a hard place, sometimes you have to choose the hard place.

当你被卡在岩石与硬壁之间，有时候你不得不选择硬壁。

Since my mother and my wife were at war with each other, I was stuck between a rock and a hard place.

自从我妈妈和我老婆彼此不合，我就被卡在中间，两面不讨好。

Neither option is good; I'm between a rock and a hard place.

两个选项都不好，我现在进退两难。

You are caught between a rock and a hard place.

你处在between a rock and a hard place的境地。

Caught between a rock and a hard place.

在一块岩石和一个险要的地方之间被捉住了。

China, even with its legendary efforts to offset capital inflows with purchases of dollar assets, is now caught between a rock and a hard place.

即便是素以购买美元资产来抵消资本流入而著称的中国，目前也陷入了两难的境地。

But the show is actually named after a supporting player-Mr Robot-the mysterious leader of an underground hacking collective who recruits Alderson to destroy the company he is paid to protect, putting him between a rock and a hard place.

不过，这部剧却用一个配角的名字作为片名。罗伯特先生（Mr.Robot）是一个神秘的地下黑客组织的首领，他招募了奥尔德森，让奥尔德森摧毁雇佣自己的公司，这也让奥尔德森陷入了困境。

Another expression for having no real choice is between a rock and a hard place.

另外一个表示没有任何选择的短语是between a rock and a hard place。