This shows that teens may find it more difficult to control risky behavior when their friends are around, or in situations where they are extremely angry.
这表明，当他们的朋友在身边，或者在他们极度愤怒的情况下，青少年会发现更难控制危险行为。
There may be circumstances under which it's the case but it's often difficult to control.
可能在某些环境下可以做到,但是通常情况下很难控制。
Ronaldo also revealed that he suffered from a thyroid problem that had made it difficult to control his weight.
罗纳尔多更坦言患有甲状腺疾病，难以控制自身体重。
Because of not having fixed point sources, it was difficult to control non - point sources.
由于没有固定的污染源，控制非点源污染要比控制点源污染困难得多。
It was a very safe boat, but difficult to control. It turned every way except the one I wanted to go!
这只船非常安全，但极难控制，它就是不朝我要去的方向前进！
The governing system of a hydraulic turbine is non-minimum phase system, and much difficult to control.
水轮机调节系统是非最小相位系统，是较难控制的一类系统。
Wood from legal sources in Aceh is limited, and cutting of the local forest resources is difficult to control.
在亚齐，合法来源的木材很有限，而且对砍伐当地的森林资源的情况很难进行控制。
These worms are difficult to control once the bowel is opened, and considerable peritoneal soiling may result.
一旦肠子切开，大量蛔虫较难控制，可导致腹膜严重污染。
These worms are difficult to control once the bowel is opened, and considerable peritoneal soiling may result .
一旦肠子切开，大量蛔虫较难控制，可导致腹膜严重污染。
Wireless control is used for impeller type feeders because it is difficult to control them by conventional means.
用常规控制方法来实现对叶轮给煤机控制比较困难，因而对其实施无线遥控技术。
The machining quality of the hole is difficult to control because of the interactional complexity between laser and material.
由于激光与材料相互作用的复杂性，使得小孔加工质量很难控制。
Software maintenance plays an important role in the total process of software development, but its cost is difficult to control.
软件维护在软件开发过程中占有相当重要的位置，但是其成本往往是很难控制的。
In fact, more than 90 percent of cancer deaths are the result of metastasis, which is difficult to control with current therapies.
事实上，有超过90%的肿瘤患者就是死于转移的，而目前对于转移尚无有效的治疗方法。
Also, because of the increasing size and the complexity of software, the software quality has become difficult to control and manage.
同时，随着软件规模的日益庞大、复杂度越来越高，软件的质量也越来越难以控制与管理。
If the two preconditions are difficult to satisfy, the model error caused by the linear approximation will become difficult to control.
如果这两个前提难以满足，由线性化近似模型带来的模型误差将变得难以控制。
As the drillings in a specific survey zone usually are much fewer, it is very difficult to control the variation of reservoir spatially.
但由于工区内钻孔往往稀少，因此，在空间上很难控制油气藏的变化特征。
Many people feel awkward if there is a silent pause on the stage, or their nerves make it difficult to control the pace of their delivery.
如果在演讲台上出现了一段冷场停顿，许多人都会觉得很尴尬，或他们的紧张情绪使得控制演讲的节奏变得困难。
Cross-cultural communication in foreign business and trade negotiations is a content that is difficult to control for domestic negotiators.
涉外商贸谈判中跨文化沟通，是国内企业谈判者难以把握的内容。
"If all such activities go underground, they would be more difficult to control," Lee says, potentially opening a greater market for trafficking.
Lee指出，如果所有活动都转入地下的话，监管会更加困难，而且还可能会滋生一个更大的人口贩卖市场。
However, the noise of the small gasoline generator sets is difficult to control, which has seriously affected the export of the generator sets.
但由于国产小型汽油发电机组的噪声问题难以解决，目前已经严重影响了产品的出口。
The virus has also proved to be particularly difficult to control in poultry populations and is now considered endemic in parts of South-east Asia.
该病毒还已证明很难在禽群中得到控制，目前已被认为在东南亚部分地区呈地方性流行。
For a long time, it is generally agreed that the form is unified, but the content is heterogeneous and changeable, extremely difficult to control.
长期以来，人们普遍认为该书在形式上整齐划一，而在内容上是驳杂多变、极难驾驭。
The retaining screw is a weak part of the whole superstructure . The causes of the screw loosening and fracture are complex and difficult to control.
固位螺钉是整个种植义齿上部结构中比较薄弱的部分，其松动、折断的成因复杂且难以控制。
The mean flue temperature is affected by many factors and it is difficult to control the temperature to require precision by the normal control methods.
直行温度受多种因素的影响，采用常规的控制方法难以将温度控制在要求的精度范围内。
Originally, the front wheel was much larger than the rear wheel, and the rider was elevated a great deal, making them difficult to control and very dangerous.
早期自行车的前轮比后轮大很多，而且车座也很高，使得骑车人很难控制车子。这种情况是相当危险的。
Secondly, differential geometry theory has been introduced to permanent magnet thruster motor for solving the problem of nonlinear object difficult to control.
第二、将微分几何理论引入到永磁推进电机系统中，以解决非线性控制对象难于控制的问题。
Secondly, differential geometry theory has been introduced to permanent magnet thruster motor for solving the problem of nonlinear object difficult to control.
第二、将微分几何理论引入到永磁推进电机系统中，以解决非线性控制对象难于控制的问题。
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