Structurally, the appendix is isolated from the rest of the gut, with an opening smaller than a pencil lead, protected from the fecal stream that might be carrying pathogens.

从构造上看，阑尾位于盲肠的末端，不与其他部分连结。 它有一个比铅笔心还细的开口，防止了可能携带病原菌的废物流入其中。

youdao

A forcible stream of air, gas, or steam from an opening, especially one in a blast furnace to aid combustion.

吹风，送风从出口，尤其是从助燃鼓风炉的出口出来的空气，其他气体或蒸汽气流。

youdao

With the machine still running, slowly pour oil in a thin, steady stream through the lid plug opening until emulsified.

保持机器运转，以细流、缓慢将油从加料口加入，至乳化（与之前的物质完全融合在一起，无水油分离）

youdao

About 80ft high, I'd guess, it is beautiful rather than vast - a rushing stream that catches the light from an opening in the forest canopy and plunges into a pool where there were two people bathing, and from which, surprisingly, they produced a large basket of freshwater crabs.

BBC: Following Graham Greene to Liberia's sacred waterfall