v.吸,吮( suck的第三人称单数 );舐,吮吸;
例句:
The child still sucks its thumb.
这个小孩还吸吮拇指.
Plant sucks from the soil.
植物从土壤中吸取养分.
He sucks up all the information you give him.
他把你教给他的知识都吸收进去了.