他打了个呵欠伸了伸懒腰。
黎明时在草坪上，打欠伸的溺水者开端皱眉头。
At the dawn on the lawn the yawning drowned man began to frown.
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.
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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