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。
In summer, people like to go sailing, swimming, horse-riding, and rock-climbing in the mountains.
夏天,人们喜欢去扬帆航行、游泳、骑马,还到山里去攀岩。