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The results show that because of fourth-order dispersion,cross-phase modulational instability occurs at two spectrum regions in both the normal and the anomalous dispersion regime of fiber.

结果表明：由于四阶色散的影响，在色散缓变光纤的正、反常色散区，交叉相位调制不稳定均发生在两个频谱区。

It is shown that because of the fourth-order dispersion,cross-phase modulational instability occurs at two spectrum regions in both anomalous and normal dispersion regimes of fiber.

结果表明：由于四阶色散的影响，在光纤的正常、反常色散区，交叉相位调制不稳定性均发生在两个频谱区。

Heat flow only occurs if a target surface is normal to a contact surface.

在接触区内，热流仅在接触的法向方向上进行。

Burning of the propellant grain always progresses normal to the burning surface, and occurs in a uniform manner over the entire surface area exposed to combustion.

燃烧的推进剂药柱始终进展正常燃烧表面，并且发生在一均匀地在整个表面积暴露在燃烧。

The south and north of the windward side of the Annam Cordillera show great difference in the diurnal variation of rainfall, which is related to migration of rainfall. Rainfall over coastal areas of the Thailand Gulf in 01-04LST migrates to inland northeastwards and then heavy rainfall occurs over areas southwest of the Annam Cordillera in 16-19LST, after that heavy rainfall migrates northwestward along the Annam Cordillera to areas northwest of the Annam Cordillera in 01-04LST in the next day. The migration of rainfall results in different characteristics of diurnal variation on the windward side of Annam Cordillera.

长山山脉西侧迎风坡的一南一北两个区域，表现出明显不同的降水日变化特征，其原因与降水的传播有关。01-04LST，降水大值区出现在泰国湾东部沿海，并向中南半岛岛内传播，16-19LST在长山山脉西南侧形成降水大值区，之后降水进一步沿山脉向西北传播，并于次日01-04LST传到长山山脉西北侧区域，通过降水的这种传播特征从而导致长山山脉迎风坡一侧不同的降水日变化特征。

The earliest evidence of primitive forms of counting occurs in notched bones and scored pieces of wood and stone.

有关计算基本形式的最早证据出现在锯齿状的骨头和有刮痕的木片石片上。

Embryo sac A large oval thin-walled sac in the nucellus of flowering plants in which egg fertilization and subsequent embryo development occurs.

胚囊：是存在于显花植物胚珠珠心中的一个大型椭圆状的囊状结构，卵细胞受精和随后的胚胎发育均在这里进行。

The greatest amount of nuclear binding energy per nucleon occurs for nuclei in the vicinity of iron.

按每个核子计，最大的核结合能量出现在铁附近的核中。

It is inferred that its active transcription occurs in the same region, not the nucleoplasm.

由此我们认为RNA聚合酶Ⅲ的转录就是发生在这一区域里，而并非是人们传统认识中的核质中。

Because of the administration and equipment, the radiation accident in which radioactive nuclide and rays do harm to the public or the workers directly or indirectly occurs sometimes.

由于管理或设备的原因，核技术应用中放射性核素、射线直接或间接对工作人员或公众的健康、安全造成危害的放射性事故时有发生。

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。