Ellen is walking down the drive with a square flatbox balanced on one hand.
埃伦正沿着车道走着，一只手上托着一个扁平的方盒子。
《柯林斯英汉双解大词典》
2
The book supporting plate, or learning tools such as books, pens, etc. can be placed on the flatbox of the spacing table simultaneously.
同时限位台扁盒既可安放书靠板，也可安放书笔等学习用具。
3
The studying of the different sections deck shows: the variation pattern of flutter critical wind speed of bridge with flatbox deck and wind yaw Angle is significantly affected by wind attack Angle.