“换防”造句

如果你能支撑那最好直到圣诞节.直到换防. -----《家园保卫战》.
It would be good if you can last until Boxing day . Till the exchange.

他更担心的是由于这个高度差, 所造成的一些换防上的压力.
What he worried is a result of this height difference, creates some a garrison on pressure.