missing part短语⁶¹³⁸⁰ 基本例句 漏做动作 “ Infrastructure is the missing part of the equation, ” he says. 他说：“这类车的问题是基础设施不足。” fortunechina Through theoretical calculation, we found the best swinging frequency for the Jet- tube of4BQD-40 Air Spray-sower. Adding area of overlapping part and missing part were minimized. 通过理论计算，找出了气力喷播机喷筒摆动的最佳频率，使漏播与重播面积之和为最小，满足了4BQD—40型气力喷播机的工作要求。 cnki