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S50.A critique of Handlin's interpretation of why legal slavery did not appear until the 1660's suggests that assumptions about the relation between slavery and racial prejudice should be reexamined , and that explanations for the different treatment of Black slaves in North and South America should be expanded .

一个对于H的关于为何法律上的奴隶制没有在17世纪60年代以前出现的原因所作解释的批评显示，关于奴隶制和种族偏见之间的关系的假说应当重新检查，而且显示出，对于在北美和南美之间的对黑怒的不同处理的解释应当被扩展。

A critique of Handlin's interpretation of why legal slavery did not appear until the 1660's suggests that assumptions about the relation between slavery and racial prejudice should be reexamined , and that explanations for the different treatment of Black slaves in North and South America should be expanded .

一个对于H的关于为何法律上的奴隶制没有在17世纪60年代以前出现的原因所作解释的批评显示，关于奴隶制和种族偏见之间的关系的假说应当重新检查，而且显示出，对于在北美和南美之间的对黑怒的不同处理的解释应当被扩展。0 Y/ m# q2 N3 g# X

A critique of Handlin's interpretation of why legal slavery did not a ppear until the 1660's suggests that assumptions about the relation between slavery and racial prejudice should be reexamined , and that explanations f or the different treatment of Black slaves in North and South America should be expanded .

一个对于H的关于为何法律上的奴隶制没有在17世纪60年代以前出现的原因所作解释的批评显示，关于奴隶制和种族偏见之间的关系的假说应当重新检查，而且显示出，对于在北美和南美之间的对黑怒的不同处理的解释应当被扩展。

A critique of Handlin's interpretation of why legal slavery did not appear until the 1660's suggests that assumptions about the relation between slavery and racial prejudice should be reexamined , and that explanations for the different treatment of Black slaves in North and South Americashould be expanded .

一个对于H的关于为何法律上的奴隶制没有在17世纪60年代以前出现的原因所作解释的批评显示，关于奴隶制和种族偏见之间的关系的假说应当重新检查，而且显示出，对于在北美和南美之间的对黑怒的不同处理的解释应当被扩展。

A critique of Handlin's interpretation of why legal slavery did no t appear until the 1660's suggests that assumptions about the relatio n between slavery and racial prejudice should be reexamined, and that explanations for the different treatment of Black slaves in North and South America should be expanded.

一个对于H的关于为何法律上的奴隶制没有在17世纪60年代以前出现的原因所作解释的批评显示，关于奴隶制和种族偏见之间的关系的假说应当重新检查，而且显示出，对于在北美和南美之间的对黑怒的不同处理的解释应当被扩展。

A critique of Handlin's interpretation of why legal slavery did not appe ar until the 1660's suggests that assumptions about the relation between sla very and racial prejudice should be reexamined , and that explanations for t he different treatment of Black slaves in North and South America should be expanded .

一个对于H的关于为何法律上的奴隶制没有在17世纪60年代以前出现的原因所作解释的批评显示，关于奴隶制和种族偏见之间的关系的假说应当重新检查，而且显示出，对于在北美和南美之间的对黑怒的不同处理的解释应当被扩展。

Handlin's A critique of Handlin s interpretation of why legal 1660's slavery did not appear until the 1660 s suggests that assumptions about the relation between slavery and racial prejudice should be reexamined , and that slaves explanations for the different treatment of Black slaves .

一个对于 H 的关于为何法律上的奴隶制没有在 17 世纪 60 年代以前出现的原因所作解释的批评显示，代以前出现的原因所作解释的批评显示，关于奴隶制和种族偏见之间的关系的假说应当重新检查，而且显示出，偏见之间的关系的假说应当重新检查，而且显示出，对于在北美和南美之间的对黑怒的不同处理的解释应当被扩展。

Handlin's A critique of Handlin s interpretation of why legal 1660's slavery did not appear until the 1660 s suggests that assumptions about the relation between slavery and racial prejudice should be reexamined , and that treatment explanations for the different treatment of Black slaves .

一个对于 H 的关于为何法律上的奴隶制没有在 17 世纪 60 年代以前出现的原因所作解释的批评显示，代以前出现的原因所作解释的批评显示，关于奴隶制和种族偏见之间的关系的假说应当重新检查，而且显示出，偏见之间的关系的假说应当重新检查，而且显示出，对于在北美和南美之间的对黑怒的不同处理的解释应当被扩展。

The Fourier transformations about the azimuthal angle and Hankel transformation about the radial direction have been used to convert the basic equations of elasticity into a non-homogenous first-order ordinary differential equation system in cylindrical coordinates.

在柱坐标系下，利用关于方位角的Fourier变换及关于径向的Hankel变换，将弹性力学基本方程组转化为非齐次的一阶常微分方程组的标准形式。

Based upon the theories of the communicative competence by Hymes ,Widdowson, Canale and Sivignon etc. and the theory about class teaching by Harmer and Littlewood, the present thesis aims at the improvement of the students' communicative competence in EFL class teaching , attempting to find the significant methods to make EFL class teaching more effective.

以Hymes，Widdowson，Canale和Sivignon等关于交际能力的理论及Harmer，Littlewood等关于课堂教学的过程的理论为基础，本文致力于研究在英语课堂教学中如何提高学生的交际能力，致力于寻找在英语课堂教学中提高学生交际能力的有效方法。

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。