A 15-year lifespan is not uncommon for a dog...15年的寿命对狗而言是比较常见的。They postulated a 500-year lifespan for a plastic container.他们假定塑料容器的寿命为500年。Most boilers have a lifespan of 15 to 20 years.绝大多数锅炉有15至20年的使用期限。The average l...
Tracking assigns some students to college prep and others to vocational programs.按照能力，一些学生被分到大学预科班，另一些则被分到职业培训班。Your teacher assigns you work to be done at home.你的老师会分配家庭作业给你.The new theory still assigns definite energy ...