A large tube of toothpaste
一大管───A big tube;牙膏───toothpaste
This is when the fascinating science of very big cosmic phenomena can be done with a test tube filled with glycerol and water.───这时一个巨大的宇宙现象背后那迷人的科学就可以在一个装有甘油和水的试管里完成。
astronauts want a shower, they go into a big tube and close the top.───宇航员在一个大的管子里洗澡,顶部是封起来的。
And because the aorta is a big tube and its pumping blood out into smaller tubes, the smaller tubes are of course going to have higher resistance.───主动脉是大血管,当它将血液泵入较小的血管时,小血管可产生较高阻力。