approach motive的用法和樣例：
例句
- Earlier in this section, we noted that the tails of the normal distribution approach but never touch the horizontal axis.
本節前面已經(jīng)指示，正態(tài)分布的兩個(gè)尾端趨近于橫軸，但永遠不與橫軸相交。 - What is specific to black holes, however, is that the redshift becomes infinite as the travelers approach the horizon.
不過(guò)黑洞特殊的地方在于，隨著(zhù)旅人向視界趨近，紅移會(huì )變成無(wú)限大。
