1.
If a plant extract helped to fight an infection, why bother trying to figure out which molecule did the trick?
如果草药熬出的汤汁能够治疗某种疾病，为什么还要劳神费力地写出这一药剂的分子式呢？
2.
Physical or mental weariness resulting from exertion.
疲劳由于费力而引起的身体或精神上的虚弱
3.
To pull at vigorously;strain at.
用力拉…，为…用力，费神
4.
Why should I trouble about it?
我为何要为此费心劳神呢?
5.
you mind going over the report?
劳您费神看看这份报告。Would
6.
I have had to fight shy of invitations that would exhaust time and spirits.
我不得不谢绝费时劳神的邀请。
7.
The new approach, of course, is to reduce labor costs and problems.
新的方案当然是要减少劳力费用和劳力问题。
8.
labour and other production costs are much higher in my country.
我们国家的劳力和生产费用要高得多，
9.
To take it apart now would mean wasting a lot of labour.
现在把它拆卸开，就会浪费大量劳动力。
10.
On Commodities Price ,Labor Price and Consumption Demand;
论产品价格、劳动力价格与消费需求
11.
Research is more mentally fatiguing, contrasted with physical labour
与体力劳动相比，研究工作更容易形成心神疲劳。
12.
Middle-aged mental workers, please take anshen Buxin Capsules which have the function of calming and nourishing the heart.
中年脑力劳动者，请服用安神补心胶囊。
13.
The analysis of 1024 cases of psychoses and indantificaton of labour ability
精神残疾和劳动力鉴定1024例分析
14.
The expenses and workforce required for the removal or dismantling shall be included in the investment and labour plans of the construction unit.
迁移、拆除所需费用和劳动力由建设单位列入投资计划和劳动计划。
15.
This plot, consisting of three or four beds, occupied the Bishop almost as much as did his books.
那块方地又分作三四畦，主教在那地上所费的劳力和他在书本里所费的劳力是一样的。
16.
Such labour also requires effort, and what's more, it allows of no error.
这种劳动同样是费力的，而且不能出一点差错。
17.
Well, you can just look at the costs incurred in redundancies or dismissals.
而且，请你看看在多余劳力和解聘时所花的费用。
18.
The preparation of numerous props entails considerable time and labor.
准备大量的支柱需要花费许多的时间和劳力。