这种费用是根据收入高低滑动折算的。
Fees are calculated on a sliding scale according to income.
字身高低印刷文字从字脚到字面的高度，标准为0。9186英寸（为2。333厘米）
The height of type from foot to face, standardized at0.9186 inch(2.333 centimeters).
这种书桌的高低可以按照你的需要调节。
This kind of desk can be adjusted to the height you need.
