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The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.

精子产生于输精管母细胞（精原细胞）。

Thickening of the arterial wall with malignant hypertension also produces a hyperplastic arteriolitis. The arteriole has an "onion skin" appearance.

恶高血压引起动脉增厚发生增生小动脉炎，小动脉呈洋葱皮样表现。

Drupe (pyrenocarp) A fleshy indehiscent fruit containing one or more seeds each surrounded by a hard stony wall, the endocarp.

核果（子囊壳）：是一种肉质闭果，其内包含一枚或多枚种子，并且每粒种子包被着坚硬，即内果皮。

The results show that high pinning field could be obtained with appropriate thickness and magnetocrystalline anisotropy constant of cell boundary phase.

计算结果表明,只有合适胞厚度和磁晶各向异常数才能获得高钉扎场。

The exine of pollen wall is of different electron density, the nexine dense and the sexine, comprising tectum, bacules, and foot layer, relatively thin.

花粉外分为外层和内层，外层包括覆盖层、基粒棒和基足层等三层，内层只包含一层。

Methods The morphosis of the mesothelium of the parietal pleura in rat were investigated by intrapleura injection with tracers and observed by scanning electron microscope.

方法向大鼠胸膜腔内注射踪剂,应用扫描电镜方法观察胸膜间皮形态变化。

Here PMN's that are marginated along the venule wall (arrow) are squeezing through the basement membrane (the process of diapedesis) and spilling out into extravascular space.

图于小静脉中粒细胞（箭头所）正挤出基底膜（渗出），游走到血管外。

The utility model discloses a fanhead of a fanner which is used as the fanhead of a ceiling fan, a desk fan, a floor fan and a wall fan.

本实用新型公开了一种电风扇扇头，它可用作吊扇、台扇、落地扇和扇扇头。

TPCO Iron-making Subsidiary adopts a stoppage method of dropping the stock level with vacant stockline to expose the staves inside the blast furnace in order to replace the damaged ones.

介绍了天津钢管制铁有限公司为了更换高炉损坏冷却,采取了空料线降料面停炉方法裸露冷却实践。