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。
We keep trying all four methods, but he sheer volume of rubbish we produce worldwide threatens to overwhelm us.
我们一直在试这4种方式,但是,我们在世界范围内仅产生的垃圾的量就有把我们覆盖的危险。