蒸馏系统中的冷凝器将蒸汽转化为液体。

The ___condensers in the distillation system turn vapor into liquid.

显微镜的聚光镜需要清洁以确保光线均匀照射样本。

The microscope's ___condensers need cleaning to ensure even light distribution on the specimen.

这个老式收音机需要更换几个损坏的电容器才能正常工作。

The old radio needs a few faulty ___condensers replaced to work properly.