Chick eggshell breaking relies on cooperation of two tissues, lock jaw ligament and shell breaking muscle (named by author).

雏鸡破壳依靠两种组织协同作用来完成，即锁颌韧带和破壳肌(作者命名)。

youdao

Props to you Zynga for finally breaking out of your shell and being original.

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VTech, the company you likely associate with old school telephones and educational toys, is breaking out of its shell in a big way.

ENGADGET: VTech plunges into home audio market with IS9181 WiFi radio