Mesectoblast
中外胚层, 外中胚层
🗣️ 情景例句
That's easy. Walk to the corner.
很好找。你走到拐角
John's parents will rejoice at his safe return.
约翰的双亲会因他的安然归来而惊喜万分。
Please be aware that this is a crucial issue to us.
请了解这一点对我们至关重要。