您要查找的是不是：
- track average LET 径迹平均传能线密度
- Let's go somewhere off the beaten track this summer. 今年夏天让我们到不大有人去的地方避暑吧。
- The average age of the boys in this class is fifteen. 本班男生的平均年龄是十五岁。
- Our pilotless rocket enters the track of the earth. 我们把一个无人驾驶的火箭送入了地球的轨道里。
- The average output of the factory is 20 cars a day. 该工厂的平均产量是每天20辆汽车。
- This rough track will soon be a metalled road. 这条坑坑洼洼的路不久就要铺上碎石了。
- I'm trying to track down my old Aunt Maud. 我正试图寻找到我那年迈的婶婶莫德。
- His income is well below the average. 他的收入大大低于平均水平。
- The cyclist went at full sail along the track. 自行车手沿着跑道全速前进。
- We fail one student per year on average. 我们平均每年有一个学生不及格。
- Bill has a feeling he is on a fast track. 比尔感觉到他正快速迈向成功。
- The new race track is nearly six miles in extent. 这条新跑道将近六英里长。
- Meals average out at 5 per head. 膳食平均每人5英镑。
- On average we receive five letters each day. 我们平均每天收到五封信。
- Each household sold, on the average, two pigs. 平均每户交售了两口生猪。
- John bears the bell in all track events at school. 约翰在学校里的各个径赛项目中都赢得第一名。
- Our reps make on average six calls day. 我们的销售代表平均每天打六次电话。
- I'm on the track of a valuable painting. 我在追寻一幅珍贵的油画。
- His work at school is below the average. 他的学业成绩在一般水平以下。
- Keep track of the time you actually travel. 把你旅行的实际时间记录下来。
