How they sang. And a few weeks later when a tiny chick hatched, their happiness seemed to know no bounds.
阳光和雪球高兴地欢唱着。几个星期后，一只小鸟破壳而出，它们欣喜万分。The chick breaks his way out into the world.
鸡雏破壳而出来到了这个世界。Only at the moment when the shell cracks open can it burst out and soar up into the sky.
只有等到它破壳而出时，才能一飞冲天。When they came near the incubator, chick just got out of its egg shell.
当他们到达卵化器附近时，一只小鸡从鸡蛋里破壳而出。A single factor experiment was develop to establish the relationships between the shelled force and size and water content, respectively.
由单因素试验得出了板栗大小和破壳力之间、板栗含水率与破壳力之间的函数关系式；Even if investigators have indeed found the salmonella source, you may wonder, how can the bacteria get inside the hard shell of an egg?
即使调查人员已经找到沙门氏菌源头，你可能会好奇，这种病菌是怎样破壳而入得。They built a nest together, incubated and hatched a fertilised egg donated to them by one of the keepers.
他们一同筑起了个窝，并且孵化这只受精的企鹅卵，让直到小企鹅破壳而出。Age is not all decay ; it is the ripening, the swelling, of the fresh life within, that withers and bursts the husk.
年轮并不意味着衰败；它在成熟着，萌发着，新的生命孕育其中，随时从枯萎中破壳重生。When the eggs hatched, the scientists challenged the immune system of each duckling by injecting it with foreign cells.
当小鸭破壳而出，科学家们用向每只小鸭注射外来细胞的方式挑战他们的免疫系统。