Collagens
(collagen 的复数) n. 胶原\\n[化] 骨胶原; 胶原
🗣️ 情景例句
And without their energy and stamina,
没有他们的体力和耐力，
It can't be helped.
无能为力。
When I touched him on the shoulder, he turned around.
我拍他的肩膀，他转了过来。