If you take the high-speed rail, and you will save much time.
如果你坐高铁的话会节省很多时间。
The law lowering the speed limit for cars helps to save fuel.
降低汽车限速的法律有助于节省燃料。
This slows down the speed of adding items but does potentially save on the amount of memory allocated.
这一点就降低了添加子项的速度,但是也潜在的节省了内存分配的数量。
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