They've promised to keep both we quality and the quantity of the 300 bicycles in conformity with the contract stipulations.
他们已承诺那300辆自行车的质量和数量一定与合同规定相吻合。
Finally, trust your own ideas and your own thinking! It is your own life, so find something that you enjoy doing.
最后相信你自己的看法和想法!这是你自己的生活,因此,找你喜欢做的事情来做。