sum SUM =surface-to-underwater missile 舰对水下导弹[飞弹]。 n. 1.总数,总计,总额;【数学】和。 2.〔the sum〕概略,大要,要点。 3.款项,金额。 4.算术(题);运算,计算。 5.【诗】顶点,绝顶,极点。 sum remainder, product, quotient 和,差,积,商。 a sum total 总计,合计。 the sum of his opinions 他的意见的要点。 a good [considerable, round] sum一大[整]笔钱。 a large [small] sum of 巨[小]额的,大[小]量的。 be good at sums 算术好。 do [work, make] a sum(s) 计算,做算术题。 in sum大体上,一言以蔽之,总之。 the sum (and substance) 要点。 the sum of things (最高的)公共利益;宇宙。 vt. (-mm-) 合计,总计;总结,总括,概括。 vi. 总计(into, to);(法官听原告、被告陈述后)概括要点 (up)。 Contributions sums to several thousand dollars. 捐款总计达数千美元。 sum up 总计,总结;总起来说。 sum up experiences 总结经验。
Results the doppler spectrum of the combined motion of the chamber and the fluid was the vector sum of their doppler signals . conclusion cardiac motion alters the doppler signal derived from blood flow and this effect should be considered in the doppler flow velocity measurement 结论通常所谓的血流速度频谱实际上是血细胞在心脏内流动速度和心脏运动速度的矢量和,即两项运动的复合频谱,所以,为减少误差,在用多普勒血流速度频谱测定血流参数时,应考虑校正问题。