一圈

In the National Games in 1910 held a men's basketball exhibition game, the major cities in the country, and basketball in school activity conducted, including Tianjin, Beijing, Shanghai better, higher level, then rules of the game is very simple painting in the middle of a golf course about 1 meter in diameter circle with center jump ball, when players must be placed one hand behind the waist, should not take any outside foot.

在1910年的全运会上举行了男子篮球表演赛之后，在全国各大城市的大、中学校的篮球活动逐渐开展起来，其中以天津、北京、上海开展得较好，水平也较高，当时的比赛规则很简单，在球场中间画一个约有1米直径的中圈，中锋队员跳球时一只手必须置于背后腰部，任何一足不得踏出圈外。

The base part is curved concavely so as to form a space between the base part and the bead core, and an anchor rubber having a complex elastic modulus of from 20 to 80 MPa is disposed in the space to tightly pinch the carcass cords between the anchor rubber and the bead seat of the wheel rim.

所述基部凹曲以形成一个介于所述基部和胎圈芯之间的空间；且一复合弹性模量为20到80MPa的锚固橡胶设置在所述空间中，从而箍紧锚固橡胶和轮辋的胎圈座之间的胎体帘线。

This paper established a new kind of relation on projection——conic projection analogue by introducing the latitude circle and longitude circle analogues, then discussed the best choice of the conic vertex angle in this projection, and found the mathematical model and the applicable scope of this projection.

摘 要：本文通过引入类纬圈和类经圈，建立了一种新的投影关系——类圆锥投影，进而探讨了类圆锥投影中圆锥顶角的最佳选择，找到了类圆锥投影的数学模型和适用范围。

Bearing bore or outside the surface and the ferrule end face connected to a ring surface.

轴承内孔或外表面与套圈一端面连接的套圈表面。

That was the year the Hula Hoop, a hollow plastic hoop, appeared in stores.

就在这一年，呼啦圈--一种空心塑料圈在商场里出现了。

Further,we findalso that groups in Saito's results may be replaced by right groups;secondly we mainly investigatethe semidirect products and wreath products of P-regular semigroups;Finally we shallcharacterize the sandwich matrice of completely simple P-regular semigroups,and investigate thestructure of P-regular semigroup whose C-set satisfies a permutation identity.

在这一章中，首先指出Saito在研究半群的半直积和圈积时，对S的限制是不必要的，证明了Saito结果中群可换为右群；其次，研究P—正则半群的半直积和圈积；最后刻划了完全单P—正则半群的夹心阵和C—集满足置换恒等式的P—正则半群的结构。

The theory holds that before cultures widely come into contacts each of them exists as a circle;(1)each circle includes many ingredients which are closely related to one another and are impartible;(2)the change of one aspect necessarily causes the change of other aspects;(3)they differ only in degree instead of in nature.

这一理论认为，在世界上的文化广泛联系之前，它们都各自成为一个"圈围"，每一个圈围都包含许多的成分，这些成分是密切联系而不可分的；一方面的波动必然影响到别的方面；它们只有程度的不同，而没有性质的差异。

So we designed a adaptive synchronizing controller based on hereinbefore hardware environment: first a small magnitude reference signal r is outputted to system through the signal card (to ensure that the vibrating system works in a linear state), and this signal is sent to the moving coil of vibrator through the power amplifier, so vibration is produced through electromagnetic induction. Secondly the vibration signal can feedback to the data acquiring card in the servo system through the acceleration sensor on the Vibroseis reactor M〓 and the base-plate M〓, then the computer can get the current vibrating state y〓 of the coil of vibrator according to the feedback information from the data acquiring card, and give a real time comparing between the current state y〓 and the reference output y〓 of the set-in reference model with current reference input being r , then regulates the correlative controlling parameters according to the error e〓=y〓-y〓 till y〓→y〓, finally normal signal sweeping begins with a certain phase fixed. Meanwhile a synchronization signal for seismic signal record is sent to seismograph from synchronization signal outputting component in the Vibroseis system to perform the controlling process of synchronization of sweeping phases.

为此，我们基于以上的硬件环境设计了一个自适应同步控制器：首先通过信号发生卡对系统输出小幅度的参考信号r(从而保证振动系统工作处于线性状态)，信号通过前置放大器、功率放大器等送到激震器动圈，并通过电磁感应产生振动，振动信号通过可控震源激震器反应块M〓和基板M〓上的加速度传感器反馈给伺服系统中的数据采集卡，工控计算机根据采集卡的反馈信息，获取当前激震器动圈的振动状态y〓，并实时地将该状态与内置的参考模型在当前参考输入r下的参考输出y〓进行辨识，再将两者输出误差e〓＝y〓-y〓对系统的有关控制参数进行调整，直至y〓→y〓，最后在经过某一固定的相位后，开始信号的正常扫描过程，与此同时，由可控震源系统的同步信号输出部件向地震仪送出一地震信号记录同步信号，进而完成扫描相位同步控制过程。

And whereas the king saw a watcher and a holy one coming down from heaven, and saying, Hew down the tree, and destroy it; nevertheless leave the stump of the roots thereof in the earth, even with a band of iron and brass, in the tender grass of the field, and let it be wet with the dew of heaven: and let his portion be with the beasts of the field, till seven times pass over him

王既看见一位警卫者、就是一位圣者、从天上降下来，说∶'要将这树伐倒毁坏；然而它根上的树墩子却要留在地里，用鉄圈和铜圈箍住，在山野的嫩草中让天露滴湿，使他的分儿跟山野的走兽一样，直到七个时期他都经历过去

At present, the ring rolling technology roll one ring in one process, and the technology can't deal with stress focus on the sharp taper angle of mandrel roller.

目前锥形套圈辗扩技术只能一次成形一件，而且由于锥形套圈锥角使得芯辊应力集中严重。

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。