二次（根）公式 {数} quadratic formula;
热门单词
- 保险板 safety guard;
- 保险柜 safe;
- 保险栓 lock;
- 保险气袋 airbag;
- 保险申请 insurance application;
- 保险盒 fuse box;
- 保险短路开关 battle short;
- 保险箱 proof box; safe; ark; bank's vault; strong-box; safe deposit box;
- 保险类别 branch of insurance;
- 保险粉 sodium hydrosulfite; hydros;
- 保险系数 factor of safety; safety factor;
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- 保险纱管底纱 {纺} bottom bunching;
- 保险经济学 economics of insurance;
- 保险经纪人 canvasser; insurance brokers;
- 保险联接器 safety coupling;
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- 保险装置 safety action; safety device;
- 保险螺栓 shear bolt;
- 保险计算员 actuary;
