1.on foot 步行

例句:I go to school usually on foot.
我上学通常是走路去。

2.so far 目前

例句:What have you found so far?
你到目前为止发现了什么？

3.public buses 公共汽车

例句:Another primary reason is that there seem to be too many private cars and not enough public buses.
另一个主要原因是私家车过多而公交车不够。

4.air-conditioned 备有空调的

例句:Is this apartment air-conditioned?
这间公寓有空调设备吗？