Scientists are
then able to pump air or fluid through the tubes to mimic breathing or blood
flow.
New drugs can then be introduced into these micro-systems, revealing
any negative effects they may have on humans.
感觉其中的then似乎拿掉也对句子没影响
这是类似然后 接着 这样的意思吗
比如说翻为
接着科学家们可以管路灌入空气..
然后新的药物可以被注入这些..
这样?