I've managed to narrow the list down to twenty-three.我已设法把清单上的项目压缩到了23项。And the number of extinctions continues at a high rate in the twenty - first century.灭绝物种的数量在 二十一 世纪仍在以很高的速率上涨.Photographs of the crime scene b...
By the time he's twenty he'll know everyone worth knowing in Washington.到20岁时,他就会认识华盛顿所有值得认识的人。Take a hundred and twenty values and calculate the mean.取120个值计算平均数。Southbound traffic tailed back for twenty miles...