以硝酸、磷酸为浸泡剂，在强氧化剂的作用下，对无硫膨胀石墨的制备进行了初步研究。

Study on preparation of sulphur-free expanded graphite was made using nitric acid and phosphoric acid as steep in strong oxidizing environment.

youdao

柠檬汁和苏打粉的混合溶液就是不会产生污渍的温和漂白剂。在清洗之前，把衣服在这种溶液里浸泡半个小时即可。

For a mild, stain-free bleach, soak your delicates in a mixture of lemon juice and baking soda for at least half an hour before washing.

youdao

只要把衣服在这种特殊的洗涤剂中浸泡一段时间，大部分污垢就可以泡掉。

You can soak out most marks in this special cleaning liquid if you leave the clothes in it long enough.

youdao