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1·While flowing through a pipe, the fluid is subjected to the loss of head due to the friction of the inner surface of the pipe against it.

流体流经管道时，由于管道表面的摩擦力而产生力头损失。

2·The different structure of the three-way pipe lead to the different local loss of head, it cause a great influence on operating costs of irrigation.

“三通”结构形式的不同会造成不同的局部水头损失，对灌溉运行费用影响很大，所以对三通结构进行优化，减小灌溉水头和局部水头损失有相当大的意义。

3·The flow regime, sediment deposition and the loss of head of two head tanks of the sewage pumping station with different dimensions are studied by using a hydraulic model test method.

采用水力模拟的方法对两个不同结构尺寸的污水泵站高位井的水流流态、泥沙淤积及水头损失等进行了模型试验。

4·Blood vessels in the head tighten to stop the loss of body heat and then relax to let blood flow rise; that sudden rush of blood is what causes the headache.

头部的血管收紧以阻止身体热量的流失，然后放松让血液流动起来，血液的突然涌入是引起头痛的原因。

5·The sherry went to my head and I was im- poverished for days by the loss of sixpence.

六便士的酒钱落到我头上，接下来几天我几乎身无分文。 这里的女主人叫艾伦?

6·Two years ago, his elderly mother began showing signs of memory loss after striking her head on the pavement outside her home.

2年前，年岁已高的妈妈在门口的人行道上摔到了头，之后开始出现失忆症状。

7·The financial rescue plan passed by the US Congress is viewed as flawed but necessary to head off panic in financial markets and loss of confidence in the economy.

人们认为美国国会通过的金融纾困计划有缺陷，但对于防止金融市场中出现恐慌情绪、避免人们丧失对经济的信心，又是必要之举。

8·Concussions are a type of internal head injury that causes the temporary loss of normal brain function.

脑震荡是一种闭合性脑损伤，它会引起短暂的脑功能障碍。

9·Hypothyroidism is an underproduction of certain hormones and is the most common cause of patchy hair loss known as alopecia areata (which can affect the whole body and not just the head).

甲状腺功能衰退症就是某种激素分泌较少，这是头发脱落形成斑秃的最常见原因(这可能影响整个身体而不仅仅是头部)。

10·Men tend to get all the more aggressive when they hit the highways increasing the chances of loss of control over the car, head-on collisions and roll overs.

上了高速公路以后，男司机们会变得更加势不可挡，这样失控、追尾、翻车的概率也就随之升高。