“一次且仅一次”是极限编程的座右铭。
传输可靠性有类似的性能问题，但是其令人感兴趣的好处是一次且仅一次传送。
Transport reliability has similar performance concerns but the interesting benefit is once-and-only-once delivery.
沿着旧丝绸之路旅行是一次有趣且收益颇多的经历。
Traveling along the old Silk Road is an interesting and rewarding experience.
只有被一个你认识且信任的人呵痒才会是一次无害冒犯。
Only tickling by someone you know and trust can be a benign violation.
每天，充满好奇且谦虚地问五次“为什么”。
Each day, ask five times why with interest and without arrogance.
有7次是失败的，所有发生在下颚且于手术阶段2之前。
There were 7 failures, all in the mandible and before stage 2 surgery.
爱必须要一次次地学习，且永无止境。
Love must be learned, and learned again and again; there is no end to it.
微生物处理是一种费用低，效果好，无二次污染且操作简单的处理方法。
Microorganism treatment is a method of low cost, high efficiency and pollution free.
利用高温摄氏200度之简单且直接原理杀死空气中细菌及病毒，一次性可杀死空气中之细菌高达99.99%。
Most simple theory punification by heat up to 200 C, 99.99% for one pass killing efficiency.
第五次是当它软弱地忍耐且把这忍耐说成是强大时； ；
Thee fifth time when she forbore for weakness, and attributed her patience to strength.
且喷施2次比喷施1次效果更好。
且喷施2次比喷施1次效果更好。
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