The evolution of the frontal appendage is an important event for the early arthropods to improve their feeling and feeding ability under the fiercely 'arm race' press in Cambrian explosion.
在节肢动物早期演化阶段，前附肢的演化是提高动物感觉和捕食能力的重要事件。
They write your race number on your arm with a marker, and I had them add the words Thank you, donor family.
他们用彩笔在选手的手臂上涂上比赛号码，我让他们加上“Thankyou,donor family(感谢捐献者及其家属)”这句话。
They write your race number on your arm with a marker, and I had them add the words Thank you, donor family.
他们用彩笔在选手的手臂上涂上比赛号码，我让他们加上“Thankyou,donor family(感谢捐献者及其家属)”这句话。
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