半导体激光打标机电光转换效率高，体积小，功耗低，使用费用低廉；
Semiconductor laser marking Electrical and optical conversion efficiency, compact, low power consumption, using low-cost;
该转向架具有维修费用及线路使用费用低，货运效率更高、更经济、更安全的优点。
These bogies have such advantages as low maintenance cost and track utilization cost, higher transport efficiency, more economic and safe.
运营商将给予补贴以支持这样低的价格，但同时也将增加月使用费——并不再与苹果公司分享那些费用。
Operators will subsidise the new handsets to make this low price possible, but will also increase monthly usage fees-and will no longer pass a share of those fees to Apple.
因此，这种方法的使用费用相对低一些。
第三，因为燃料电池发动机的使用费用比内燃机发动机低，燃料电池发动机很快就会在价格上很有竞争力了。
Third, fuel-cell engines will soon be economically competitive because people will spend less money to operate a fuel-cell engine than they will to operate an internal-combustion engine.
第三，因为燃料电池发动机的使用费用比内燃机发动机低，燃料电池发动机很快就会在价格上很有竞争力了。
Third, fuel-cell engines will soon be economically competitive because people will spend less money to operate a fuel-cell engine than they will to operate an internal-combustion engine.
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