难使用的

Stretch marks can take a very long time to fade, and when they do, the healing use to be inadequate, producing scars that can be very hard to dissimulate.

妊娠纹可能需要很长的时间消失，而当他们这样做了，愈合使用是不够的，生产的伤痕，可很难掩饰。

Technical progress and development tendency of cylider, doffer plate, taker-in clothing and fixed division-carding parts, as well as the general principles for carding cloth selection, are described. Emphatically, the configuration of clothing for chemical fibre and technology and clothing adjustment of difficult-spinning fibre are given.

就国内外梳棉机锡林道夫盖板、刺辊针布和固定分梳件的技术进步与发展趋势和针布配置一般原则进行了剖析，重点讨论了纺化纤的针布配置和难纺纤维工艺和针布调整问题对相关企业正确选择与使用针布有一定的参与作用。

How to provide route to meet the driver's multiple psychological expectations is the key problem of navigation system. The essence of this problem is resource constrained shortest path problem, which belongs to NP-C problems and can not be solved with the traditional shortest path algorithm.

提供满足驾驶员多个心理期望的路径是导航系统该解决的关键问题，其本质是资源约束最短路径问题，属于NP难问题，无法使用传统的最短路径算法解决。

Using single genes as phylogenetic markers, it is difficult to trace organismal phylogeny in the presence of HGT .

使用单基因作为系统发育的标记，在有水平基因转移存在的情况下很难追查生物的系统发育。

A collegue of mine is from Ghana and bought the real McCoy back off the tree.It was lovely and very yellow,but very hard to melt in your hands.I used to have to put some in a tin,and heat it slightly,so it was easier to use.

我的一位同事曾从加纳带给我最纯正的乳木果油，它很可爱，也确实是黄色的，但是很难在手心里溶化，我只好把它放在罐子里稍稍加热后才变得容易使用。

The reason for such widespread contamination is that MTBE is highly soluble in water and recalcitrant to biodegradation.

与此同时，由于MTBE具有很高的水溶性和难降解性，使用过程中的泄露带来了严重的污染问题。

As more use is made of costly, difficult-to-machine alloys, the relative precision and dimensional uniformity of forged parts become more desirable.

随着昂贵的、难切削加工材料的更多使用，提高锻件的精度及尺寸均匀性等将更加必要。

While it was perhaps the most widely used timber for full-size ship building because it is very difficult to work with most modelers avoid its use.

虽然它也许是最广泛的使用于建造真船的木材，因为它非常难加工，大多数模型制作者都避免使用它。

At a simple level, it is not difficult to write compilable Python programs based on templatized functionality; for this to be useful, of course, you would want a program to contain some customization that was determinable only at runtime.

除了用来提供一个互动的环境，还有可能使用解释子程序的情况是在其他应用软件执行Python代码，或者是作为插件调用等等。这个不是很难，而且也非常有用。

Some kindsof fiber optics reflectance spectrophotometers have been used to identify pigments abroad, butit is difficult for the most Chinese museums and cultural relics departments to afford as theseinstruments are too expensive.

国外有人采用价格昂贵的光导纤维反射光谱仪对颜料成分作鉴定，但在我国大多博物馆和文博单位这种昂贵的仪器是很难推广使用。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。