A common seal.

一只普通的海豹。

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The corporation shall have a common seal and the affixing of the seal shall be authenticated by the signature of the trustee.

法团须备有法团印章，而加盖该印章须由受托人签署认证。

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Surfers are very common in California, and when a shark attack occurs there, it's usually because to a shark, a surfer looks like a seal-one of their common food sources-riding a wave.

在加利福尼亚随处可见冲浪者，如果鲨鱼在那袭击人通常是由于它把冲浪者看成一只在冲浪的海豹了—海豹是它们基本的食物来源。

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Ms. Seal says a common misstep is failing to notify a pension plan of the death.

WSJ: Money Issues of Surviving Spouses

The patch is also being tested for a more common defect PFO, a hole that results when the heart wall doesn't seal the way it should after birth.

NPR: Heart Repair Breakthroughs Replace Surgeon's Knife