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MAIN OUTCOME MEASURES: At weeks 2, 4, 8 and 12 after operation, X-ray examination, hard tissue slicing, determination of bone formation rate and mineral apposition rate were all performed.

主要观察指标：检测植入材料2，4，8，12周后缺损部位X射线、硬组织切片、骨形成率和矿化沉积率。

Results Four cases of pelvic injury are all multiple injuries, confirmed by X-ray photography and CT examination approvingly.

结果 四个骨盆损伤案例都是多发损伤，通过X线和CT检查均能满意地确认。

In approximation theory,the approximation of non-smooth function |x| is a very classical problem.

在逼近论中，非光滑函数|x|的逼近问题是一个非常经典的问题。

Photogravure, with etching and aquatint, printed in black and blue inks, with collage and string additions; 55 3/4 x 25 7/8 in.

凹版照相，铜版印刷和凹铜版腐蚀制版法，蓝黑墨水印刷，排成一列的拼贴画，55 3/4 x 25 7/8 in。

The feasibility of using silk fibroin as materials for making microencapsule was investigated by preparing SF/Alginate, SF/Chitin and SF/Arabin blend films, determing their mechanical properties and testing their structure by means of X-ray diffraction and IR spectra.

本论文通过制备丝素蛋白与天然高分子材料——海藻酸钠、甲壳胺、阿拉伯树胶共混膜，测定其力学性能，同时利用X-射线衍射和红外光谱测定其结构，探讨了丝素作为微胶囊包囊材料的可行性。

Then x will get some arbitrary value (as in C and C++); it will not automatically be initialized to zero .

那么x会得到一些随机值(这与c和c++是一样的)，不会自动初始化成零。

Returns the arc cosine of x in radians.

返回 x 的余弦值。

Returns the arc sine of x in radians.

返回 x 的正弦值。

Returns the arc tangent of x in radians.

返回 x 的正切值。

Polar-coordinate NC Tool accept'G01 X,Z,C'instruction to complete a resultant Archimedes Spiral trails, Which is composed of a rotational coordinateand a linear motion.

极坐标数控机床接受"G01 X，Z， C"格式的极坐标指令，完成C 轴旋转坐标和Z轴线性坐标的合成运动轨迹—阿基米德螺线轨迹运动。

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。