The thickened basement membrane (arrow) that results from immune complex deposition in the glomerular capillary loop is prominent in this electron micrograph.

电镜图示，由于免疫复合物沉积在肾小球毛细血管袢中，使基底膜增厚（箭头）。

youdao

Aeromodelling, aeroplane toys, car toys, arch, arrow, body-building loop, power twister, baseball exercise equipment and other sports goods;

航模、玩具飞机、玩具汽车、弓背、箭、健身圈、臂力棒、棒球练习器等多种体育用品；

youdao

You can kind of see where the syntax is going, looks like a loop, but you can kind of put blocks inside of you, and the little arrow suggests that once you get to the bottom just like our socks example, you're gonna do the following again.

从某种程度上你可以看到它的语法构成,像个循环，你也可以把，一些程序块放到循环中，如同短袜的例子，这个小箭头暗示你一旦到达底部,你将会重复接下来的事情。

哈佛公开课 - 计算机科学课程节选