以 my wonderful memory 为题写英语作文my wonderful memory My best memory is from childhood.We used to live in a trailer (haha) and it was at the bottom of a hill.I was probably about five and my brother was three (the little...
翻译：there may be some structure in the drift term这句话怎么译？价格的变动即使不是严格遵循"随机漫步"理论(注:西方三大股票理论之一),从很多方面来说,这一理论也是一个很好的近似表示.虽然在这种随机过程中,也存在着一定的结构性,使得投机者偶尔也能从中发现并预测小的变动,但从根本上来说,这种价格变动几乎是随机的. there may be some structure i...