initial crack stage 初破裂阶段
Crack stable growth stage 裂纹稳定扩展阶段
stage I fatigue crack 第一阶段疲劳裂纹
stage II fatigue crack 第二阶段疲劳裂纹
early-stage crack 早期裂缝
early stage crack 早期开裂
Baby Einstein is jokingly referred to as "baby crack" : it entertains babies and stops them crying, but is it safe at such a formative stage?
Baby Einstein被戏称做“婴儿试啼”：它能愉悦婴孩并使之不再啼哭，但在这样一个成型的阶段是否安全可靠呢？
Everyone loves each other at this stage, but you just know the facade will crack eventually.
大家之间的关系都很好，但你本能地知道这种表象终究会崩溃。
But the beginning of the acoustic emission sign is not the cracking point of main crack, and the preinstability stage may not be equal to the subcritical growth stage.
但是，声发射信号的起始点并不是主裂纹起裂点，失稳前阶段也不能与亚临界扩展阶段等同。
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