求,下面這篇作文的翻譯,Nowadays,with the developing of the rapid economic,the city air has been polluted heavily.moreover,a great number of new style transportion tools come out leading to tough traffic.reading a bicycle has been called on to decline the pollution.I had a forgetable experience of learning to ride a bicyle.,i was scared to ride on the bicycle on my own.my father was always after me closely.with the help of my father,after a long time,i am not afraid to ride alone.that is to say,i've learned well.i am grateful for dad.he gave me the courage to overcome the difficulty.since that,when i come across any problems,i will think of my father and the power he gives me.