复数： nozzles

But a nozzle alone is not enough .

但光有喷嘴是不够的。

When this mixture emerges from the nozzle , it bubbles like champagne .

当混合物通过喷嘴喷出，它就会像香槟一样起泡。

Here workers move an engine nozzle to the merlin assembly line .

此时工人们正在移动一个发动机喷管到merlin发动机组装线。

The nozzle and bell-shaped combustion chamber have yet to be attached to this engine .

钟形喷嘴和燃烧室此时还没有被连接到这台发动机上。

But because the icy h is pumping through the entire system , the engine nozzle remains cold .

但由于冰冷的氢被充进整个系统，引擎的喷嘴也会保持低温。