难

The system is reportedly 100 percent silent and extremely difficult to track by air on ground-based radar systems.

这种系统据称还是完全静音的，地基或空基雷达很难探测到。

Air-con hard to control - generally impossible to get below 24c during day despite many engineer visits and room change.

空调比较难控制，白天基本上不可能调到低于24度，虽然好些修理工来看了看，还换了房间，还是改变不了这情况。

The variety of airborne is so great that it is difficult to construct tidy classifications.

气载的种类是如此之多，以致于很难作出严整的分类。

Marine: Its going to be hard to take it down, can you airdrop us anything?

陆战队员：很难打败他们，你们能空投一些物资么？

It is difficult to imagine, it would be chairman of an airline's office.

很难想象，这会是一家航空公司董事长的办公室。

Nowadays it is hard to find a large civil airliner that is not supersonic.

现在要找到一架不超音速的大型民用客机很难。

In addition to the dirty of volatile solvents, to airproof.

不兴不不污剂洋的溶剂难挥发，给夺目密封。

With such diverse achievements so soon in life, even Alanis has said she's hard to categorize: People have always said I was an old soul.

随着如此众多成就一下子闯入她的生活，就连她自己都表示很难分清，人们总说我是一副成熟的心态。

This is also very useful, albeit more difficult to set up.

虽然它们都比较难设置，但绝对是非常有用的。

I investigated how difficult it would be, and it did turn out to be difficult, albeit not impossible.

的。我研究了它的实现有何困难，发现的确很难，虽然不是不可能。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。