Family, the basic unit of society, occupies a key position in society and plays an important role and undertakes many significant social functions such as producing, bearing, educating etc.
“家庭”是构成社会的基本单位，在社会中具有重要地位，起着不容忽视的作用，它担负着生产、生育、教育等各种重要的社会职能。
The key position bolt of the engine include connecting rod, crankshaft, main bearing, cylinder head, flywheel and shock absorber bolt, all of which belong to bolt fastening.
发动机关键工位螺栓包括连杆螺栓、曲轴螺栓、主轴承盖螺栓、气缸盖螺栓、飞轮螺栓和减振器螺栓等均属螺纹联接。
Anchorage foundation is the key position of a suspension bridge, whose overall stability and bearing state directly influence the safety and long-term reliability of the bridge.
锚碇基础是悬索桥的关键受力部位，它的总体稳定性和受力状态直接影响到大桥的安全和长期使用的可靠性。
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