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。
Later it crossed the Channel, riding smoothly over the waves, which presented no problem.
后来气垫船跨越英吉利海峡,平稳地在波浪上方行驶,波浪不再产生阻力。