The contamination or damage to spacecraft can be avoided during the space conjunction and space drainage of liquid for spacecraft, if the appropriate measures are taken.

对航天器的空间交会或液体空间排放，只要采取相应的措施，就能够避免其对航天器的污染或损害。

youdao

The drug liquid after concentration by the device features non-contamination and thick drug taste and easy cleaning(it is just to open the up and down cover for cleaning).

液料在全密封中无泡沫浓缩，用本设备浓缩出来的药液，具有无污染，药味浓。

youdao

Just as a hen is about to lay an egg, she applies a liquid coating around it that naturally protects against contamination.

FORBES: Natural Protection

That can lead to bacterial contamination or worse if the wrong sort of liquid is used.

ECONOMIST: Vaccines