weak
advance的用法说明
'用作动词的用法注意及物和不及物两种用法:China is advancingrapidly in industry. 中国在工业上发展很快。We are advancingalong the socialist road. 我们正沿...'
倍数的表示法
'表示倍数时通常借助half, double, twice, three times等之类的词。如:Half (of) the apples are bad. 一半苹果是坏的。His homework is not yet half done. 他的...'