困难的工作

However the calculation of invariants for coloured Petri nets is a hard work because the elements of coloured incidence matrix are not integers, but functions instead.

但是，着色Petri网的不变量求解却是一项非常困难的工作，因为它的关联矩阵的元素不再是整数而是函数。

Because it is a hard work to refold the denatured inclusion proteins correctly, especially for those which contain several disulfide bonds. the results?repeatability of some activities is not very perfect.

纯化包涵体后，将产物变性成可溶形式，然后用Ni-NTA对表达产物纯化，SDS-PAGE检测为一条带，包涵体的复性是一项非常困难的工作，尤其是对含有多对二硫键的蛋白质，因此复性后冻干，测它的某些活性时，结果的重复性不太理想。

The choice where complex conditional testing is required is between reliable fast code and unreadable and unfixable code, most eventually take the choice of doing this type of testing in a reliable and fast manner so that the difficult work in terms of speed and capacity can be done in a reasonably timescale.

复杂的条件测试可以用两种形式的代码构造：可信、快速的代码，不易读、不易修改的代码；大多数人最终选择了第一种方式，这是的那些困难的工作在可以接受的时间尺度内完成。

However, finding the correct controlled vocabulary terms can sometimes be a difficult task for the end user annotating these data.

但是，发现正确的控制词汇术语有时对于注释这些数据的终端用户会是一个困难的工作。

Because of the complicated manufacture technique of PCB, for example, a great deal of use of ultro-microcomponent and ultro-slimwire, the quality inspection of PCB becomes very difficult and hardly automatized.

随着生产技术的提高，PCB制作工艺日趋复杂，大量超微器件和超细走线的采用，使PCB的质量检验成为一件非常困难的工作，难以实现自动化。

My advice is to go for the messes - that's where the action is.

所以我的忠告是选择困难的工作－因为这正是可以有所做为的地方。

It's important to have a faith that the power of sincerity overcomes difficulties at work.

重要的是有一个信念，真诚的力量克服困难的工作。

For example : national norms, in areas of our earthquake-proof residential projects prefabricated staircases time board must rest with the platform stairs reliable welding is a cost neither more nor technology investment difficult, but some construction units do not seriously, and even not getting to the mandatory standards, even as a child's play.

国家规范规定，在抗震设防地区，住宅工程预制楼梯踏步板必须与楼梯休息平台可靠焊接，这是一项既不多费投资也无技术困难的工作，但有的施工单位却不认真地做，甚至根本不做，将强制性标准的规定，竟视为儿戏，导致工程的抗震能力严重下降。

The purpose of this study is to explore the subjective difficulty of clinical preceptors in student teaching and the variants of different backgrounds that might influence the subjective difficulty of clinical preceptor in student teaching. This study is a quantification study carried out by questionnaires. Research subjects of this study are care workers in two regional teaching hospitals and three medical centers in Taipei who acted as clinical preceptor responsible for at least one student nurse within recent six months. The effective response rate of questionnaire was 93.08%(out of 130 questionnaires in total).

本研究目的是探讨临床辅导员自觉的教学困难，并探讨不同背景变项会影响临床辅导员的教学困难的情形，本研究为量性研究，以问卷调查为方法，以台北县市二家区域教学医院及三家医学中心，近半年内临床工作期间担任一位以上专科层级护生实习之临床辅导员的护理人员为研究对象进行方便取样，根据自拟临床辅导员自觉教学困难问卷为研究工具，发出样本为130份，实际回收样本为123份，有效问卷回收率为93.08%。

You'll often find sheet metal ducting in older homes but it is becoming less popular in newer homes, because it is more difficult to work with and not as cost-effective.

您也经常找板材ducting旧的家园，但它正在成为冷门，在新的家园，因为它是比较困难的工作，而不是作为成本效益。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。