①Its ＋ 一段时间s +走一类的动词；
②Its+距离；
how far(离…)多远；到什么程度[范围]
How far gone are you?
你怀孕几个月了？
Navigation is good and there\'s a display to show how far you\'ve drilled down.
导航很好，可以显示你正在看哪一级信息。
Think of how far we have come in a little time
想想我们在短短的.时间内取得如此大的进展。
