易疲劳的

The small end of connecting rod acts to-and-fro movement, and the big end of acts circumvolve movement. The connecting rod body acts complex plane movement. The connecting rod is one of the accessories that endures heavy load. And at the same time it endures gas pressure transmitted from the piston, the to-and-fro inertia force and inertia force engendered when itself swings.

连杆工作的小端作往复运动，大端作旋转运动，杆身做复杂的平面运动，连杆是承受负荷最严重的零件之一，同时承受着活塞传来的气体压力、往复惯性力和它本身摆动时所产生的惯性力的作用，这些力的大小和方向周期性变化，易引起连杆疲劳破坏。

The air will be beneficial to the human body due to electrostatic and anion adsorption on the screen surface, which allows the computer operator in the cation-anion imbalance in the environment and easy to cause headaches, fatigue, respiratory disease, faces a rash; Sweden and Norway, the use of computer experts is likely to increase in skin diseases, studies have been made, but is still unable to confirm the selection of skin inflammation and is directly related to the use of computers.

空气中有益于人体的阴离子会因静电而吸附在屏幕表面，使得电脑操作人员所处环境中阴阳离子不平衡，易引起头痛、疲劳、呼吸器官疾病、脸部出红疹等；瑞典和挪威专家对电脑的使用是否可能使皮肤病增加，曾作了相关的研究，但目前仍无法证实皮肤炎症的产生与使用电脑直接相关。

As the stress concentration area of the bolt,screw thread roots are the most common points for the sources of fatigue core.

作为螺栓应力集中处，螺纹根部R处是疲劳核心起源的最普遍位置，在此应力集中处，螺栓的微小制造缺陷或安装、运输过程中对其造成的损伤极易成为裂纹源，导致螺栓断裂。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。