He pipettes solutions of bacteria onto the agarose, which sucksout the water, leaving a solid layer of bacteria.
然后他用吸液管将细菌溶液滴到琼脂糖上，在琼脂糖吸干了溶液中的水分后，印章表面就会形成一层固体细菌。
2
The pump sucks air out through the valve.
气泵通过阀门把空气抽出去。
《牛津词典》
3
“Big sucks the traffic out of small, ” Milner says. “In theory you can have a few very successful individuals controlling hundreds of millions of people.