欠伸,指打呵欠,伸懒腰。语出《仪礼·士相见礼》:“凡侍坐君子,君子欠伸,问日之早晏,以食具告。”
疲倦时打呵欠、伸懒腰 stretch oneself and yawn
打欠伸 yawn verb
伸体呵欠 [医] pandiculation
我打呵欠并伸懒腰 I yawn and stretch
他打了个呵欠伸了伸懒腰。
我打呵欠伸懒腰。
在聚酯废料生产三角异形涤纶短纤维过程中对影响纤维截面异形度的主要因素:喷丝孔截面形状、纺丝温度、冷却成形条件、后欠伸工艺参数等进行探讨。
During the process of spinning triangular heteroclite dacron fibres from polyester garbage, there are factors that may affect the hetercliteness of the intersecting surface of the fibres thus spun.
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