abstracted GRE

1.He is abstracted by a bird outside the classroom.

他的注意力溜到教室外的小鸟身上。

2.Iron is abstracted from ore.

铁是从矿石出来的。

3.He has abstracted the speech.

他对讲话作了摘要。

4.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)。