One of the biggest challenges is traffic. In some areas there are marked bike lanes;

VOA: standard.2010.07.30

but I do bike in the bike lanes on First Avenue.

不过我会在第一大街的自行车道上骑车。

喜欢自行车 - SpeakingMax英语口语达人

I wouldn't necessarily ride my bike in the park at night,

我从来不在晚上骑自行车去公园，

是市民的朋友 - SpeakingMax英语口语达人

"The more people we can get on the roads with bikes the better." There will be 6,000 bikes available, and the mayor hopes once it gets rolling, this system will result in 40,000 bike trips a day.

VOA: standard.2010.07.30

My bike was in the shop a couple of days ago,

我的自行车是几天前买的，

关于学校生活 - SpeakingMax英语口语达人

I don't bike much in the parks,

我不常在公园里骑车。

喜欢自行车 - SpeakingMax英语口语达人