One reason is cost: George Cooper, the boss of OnAir, says that at prices above $3 per minute, “demand drops off considerably”, according to the firm's research.
一个原因是费用：OnAir公司的老板乔治库珀说，根据公司的调查，“价格高于每分钟3美元，需求就会大大减少”。
The portal is therefore one of the most cost-friendly education platforms, whether on-line or off-line, to be found in the marketplace today.
因此从现有的市场情况看，无论是从线上还是线下比较，这都一个很实惠的教育平台。
The one-off cross-linked fracturing technology with variable concentrations is used, and the cost is saved a lot.
在现场应用中配套实施了变浓度一次交联压裂液施工技术，节约了施工成本。
I studied the off-line one in my thesis. It has the features such as a simple circuit and a nice use with low cost.
本课题设计中主要研究后备式，它具有电路简单，经济实用的特点。
One tennis guest managed to put him off his game by asking why a can of balls cost more in one Wal-Mart than another.
一位来打网球的客人为了分散他打球的注意力，故意问了一句为什么一筒网球在一家沃尔玛商店卖得比别的一家沃尔玛商店贵。
One tennis guest managed to put him off his game by asking why a can of balls cost more in one Wal-Mart than another.
一位来打网球的客人为了分散他打球的注意力，故意问了一句为什么一筒网球在一家沃尔玛商店卖得比别的一家沃尔玛商店贵。
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