英语翻译摘要：中美贸易关系自从两国建立贸易关系以来就在摩擦和曲折中发展.中国入世随着两国经贸关系发展,贸易摩擦出现的频率

自己翻的,可能还有一些问题.
Abstract:The trade relations between China and USA have been developed in friction and tortuous since it was established .After China entered the WTO,the frequency of trade friction between the two countries increased and the US become the one have the most trade friction ,which is also most intense,with China.Trade friction in recent years mainly focus on anti-dumping","intellectual property" ,"market access" "high-tech product export control"and so on.The main reason of friction is the trade imbalance .
Key words :Trade friction between China and US; Friction focus; Root cause; Political cause; revelation
再问： the frequency of trade friction Are you sure ?这里没有错误
再答： 贸易摩擦的频率这样翻应该可以。