如果没有结晶形成，可以用玻璃棒刮一下烧瓶的瓶壁以诱导结晶形成。
If no crystals form, scratch the sides of the flask with a glass rod in order to induce crystallization.
本次清洗了12个小号循环萃取器，12平底烧瓶，以及一些集液瓶、滴管等仪器。
We cleaned 12 small size circular extractors, 12 flat bottom flasks, some collecting liquid bottle and burettes.
这个方法包括将蛋白质溶液在圆底烧瓶的瓶壁上冰冻，和在真空中让液体升华。
This method involves freezing the protein solution on the walls of a round bottomed flask and sublimating the liquid in a vacuum.
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