He is abstracted by a bird outside the classroom.
注意力溜到教室外小鸟身上。
，抽取，抽
了；被分离，分离
神，心不在焉;;;;
念地;，苍白;;;,片断;He is abstracted by a bird outside the classroom.
注意力溜到教室外小鸟身上。
Iron is abstracted from ore.
铁是从矿石中提炼
。
He has abstracted the speech.
话作了摘要。
Humic acid (HA ) was abstracted from leonardite,and a composite superabsorbent (HA PSA ) was prepared by compounding poly (acrylic acid ) and lignitic humic acid.
以风化褐煤为原料制备腐植酸(HA),将HA与普通型保水剂(PSA)复合,获得HA型保水剂(HA-PSA)。
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