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Insurance contract is aleatory contract, because whether insurer has the obligation to pay insurance benefit or not and the exact number of it all depend on whether insurance accident occurs or not and the degree of damage. Therefore, applicant can obtain huge amount of insurance benefit when insurance accident occurs, but on the contrary, applicant lose premiums when insurance accident does not occur.

保险合同是射幸合同，这是由于保险人是否负有保险金的给付义务以及应为给付时的具体数额的多少取决于保险事故是否发生及其损害的大小，因此对投保人而言，在保险事故发生时将获得巨额保险金；反之，在保险事故不发生时，投保人即丧失保险费。

Deafness which occurs at birth is called congenital deafness and that which occurs after birth is called adventitious deafness.

耳聋发生在出生时被称为先天性耳聋，并在出生后发生的被称为偶然耳聋。

When alliteration occurs at the beginning of words, it is called initial alliteration; when it occurs within words, it is called

又如著名英国女作家奥斯汀的《傲慢与偏见》也是典型的头韵法。

A toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable gray metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores.

有毒的非金属元素，有多种同素异形体，稳定且有金属特性的灰色同素异形体用于光电池，其在亮处的导电性比在暗处好，见于硫化物矿石中。注意，注意力集中

A toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores as pyrite

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When change occurs," says Wofsy,"it often occurs not linearly, but catastrophically.

当变化发生时" Wofsy 说，"它并不时线性发生的，而是灾难性的爆发。

An internal switch used by a program to remember when a certain event occurs and what to do when the event occurs.

程序使用的一种内部开关，标记何时某种事件发生以及当这种事件发生时要做些什麼。

It is one of the most widespread elements, as it occurs naturally in sea-water, salt lakes and underground deposits, but usually occurs in a safe form as common salt.

它是分布最广的元素之一，因其存在於海水、盐湖和地下水沉积物中，且以安全的氯化钠的型态存在。

The Tertiary reservoir in the vertical orientation develops three high porosity zones, every one firstly occurs in the sandstone of debouch bar and braided-divided flow channel, secondly occurs in the sandstone of raised bank and channel bar.

第三系储层在纵向上发育三个高孔带，各高孔带主要发育在沉积微相为河口坝、辫状分流河道的砂体中，其次发育在天然堤和心滩的砂体中。

The rheological character of a polymer often appears as shear-thinning. Most polymers behaviour in a solution can be explained by the polymer chain or hard sphere theory. Other than that, shear-thickening polymer solution also exists. Its behavior can be explained by dilatant theory, which suggests that the shear-thickening of the solution is due to the swelling of the polymer particles. This phenomenon often occurs in suspension or emulsion. Solution exhibits a mixed behavior can also be found whose behavior is such that shear-thinning occurs under low shear force and shear-thickening occurs under high shear force. Under this circumstance, the viscosity versus shear force graph exhibits a spoon shaped curve. The rheological study can be applied to the dispersion of paint which can predict the dispersion effect of various polymer materials in solution.

中文摘要一般高分子聚合物溶液的流变行为多半呈现剪稀(shear-thinning)的现象，而大部分的高分子在溶液中的行为是以分子链或是硬球观点来解释，另外也有剪稠(shear-thickening)现象的高分子溶液，其流变行为则是以膨胀体观点来解释，即在高剪切力下，由於高分子团体积变大而使溶液黏度升高，这在悬伏液、乳液等常见；但也有在低剪切力下，溶液具有剪稀的行为，而在高剪切力下却成现剪稠的行为，在黏度对剪切力作图时，会呈现出一个勾形曲线的图形；流变行为的探讨可应用在涂布材料的分散技术上，以推测不同的高分子溶液对分散效果的影响。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。