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 enjoy reading about them, especially when we find that, like the praying mantis, they lead perfectly horrible lives.
我们喜欢看有关昆虫的书,尤其是当我们了解螳螂等过着一种令人生畏的生活时,就更加爱读有关昆虫的书了。