Carefully tighten the clamp until it firmly supports the pipette in a vertical position .

把夹子仔细夹紧，直到它把吸量管牢牢地固定在垂直的位置上。

I use only a little aquarium and a pipette to make such shots .

我只用了一个小鱼缸和一个吸液管来完成这些拍摄。

The pipette is washed three times with the internal standard solution . With a10-m l hamilton syringe , 0.5m l of " known " and " unknown " are injected in duplicate , and the alcohol and isobutanol peak heights are measured for each .

吸量管用内标溶液洗涤三次。用一支10微升的亨氏注射器，取0.5微升的已知样和未知样各两份进样，分别测量乙醇和异丁醇的峰高。