A formal contract is signed which is renewable annually.正式签订了每年可续签的合同。Seven million doses of vaccine are annually given to British children.英国孩子每年要接种7百万剂疫苗。El Salvador produces 100,000 tons of refined copper annually.萨尔瓦...
首批飞机运送的食物、儿童衣物和药品开始抵达。The first plane-loads of food, children's clothing and medical supplies began arriving.正常情况下，巴黎的交通系统每天运送95万乘客。Normally, the transportation system in Paris carries 950,000 passengers a day.民兵首领已...
Make a checklist of the tools and materials you will need.把你需要的工具和材料开一张单子。In industry, diamond can form a tough, non-corrosive coating for tools.在工业上，金刚石可以用作工具表面坚固、耐腐蚀的覆盖层。You can buy all these tools at a do-it-yourself ...