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 ...
For ten years she dwelled among the nomads of North America.她在北美游牧民中生活了十年。North America is connected with South America by the Isthmus of Panama.巴拿马海峡把北美同南美连接起来.South America is joined to North America by a canal.南美洲和北美洲...