Healing of bone grafts is a regulated process that proceeds through several distinct phases.
通过几个不同阶段进行的移植骨的愈合是可调节的过程。
Of course it proceeds through cyclical episodes of creative destruction, but these stimulate further gains over time.
当然,它会经历一次次周期性的创造性毁灭,但随着时间的流逝,这些会带来更多的好处。
Elementary school begins with the first grade, and then proceeds through either grades five or six, depending on the system.
初级教育从一年级开始,再根据不同的体制逐步升到第五或第六级。
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