aback
ad. backwards 向後；後退地：
she walked aback to pick up her books.
她走回去把書撿了起來。
常用短語：
take sb. aback 使某人吃了一驚：
his unexpected manner took me aback.
他出乎意料的態度嚇了我一跳。
be taken aback 吃了一驚：
I was taken aback by what I saw.
眼前所見讓我吃了一驚。
abacus
【C】a wooden frame with small balls used for counting.
算盤
abandon
vt. to give up；to discontinue 放棄，拋棄：
the sailors abandoned the ship because it was sinking.
船員們離開了正在下沉的船。
常用短語：
abandon oneself to 沉溺於：
Don't abandon yourself to despair.
不要悲觀失望。
【昨天的文章】：學習英語單詞a/an
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