您要查找的是不是：
- 双阶分离式BOM结构 double-steps separative BOM structure
- 双阶分离式BOM double-layers separative BOM
- 双阶样条 bi-order spline
- 双阶过载 two-stage supercharging
- 双阶跃计时库仑法 double potential-step chronocoulometry
- 成双 atwain
- 双解 bilingual
- 半双工 semiduplex
- 门罗阶 Monroe stage
- 双拼 Two bors d's oeuveres
- 把空奶瓶放到门阶上，等送奶人来取。 Put your empties on the doorstep for the milkman.
- 双元音 diphthong
- 阶调 contrast
- 全双工 FDX
- ｎ阶 n-order
- 双冠 double comb (禽)
- ｎ阶矩 nth moment
- 母亲给她买了一双网球鞋。 Mother bought her a pair of tennis shoes.
- 比翼双飞 fly wing to wing
- 双刃 twolip
