英语语法分析

Windpipes have been grown from stem cells before, but only using the collagen "skeletons" of donated tracheas.

之前，也有由干细胞培育气管的先例，培育中使用的是捐献者的气管胶原蛋白骨架。

Mr Stearns has met men who routinely killed 100 people a day, "using a rope to crush their windpipes and strangle them".

斯特恩斯遇见过曾每天弑命百条的人，他们“用绳子勒住他们的气管，把他们勒死”。

But when rabbits with blocked windpipes received injections of the microparticles, their blood oxygen levels and heart rates remained stable.

给气管阻塞的兔子注射这种微粒时，它们的血液氧气浓度和心率保持稳定。