必须使用 meaning in English
sir/dear sir
Examples
- If we wish to avoid the inaccuracies caused by the size of the sample, we need to use the t distribution .
为了避免因样本容量大小而造成的误差，我们必须使用T分布。 - Drains which pass under a house must be of cast iron, the most expensive material for pipe drains .
穿过房屋下面的排水管道，必须使用铸铁管，这是排水管所用的最昂贵的材料。 - For every large time intervals and for stars near to the pole, it is necessary, however, to use the exact formulae of spherical trignometry .
对于很长的时间间隔和靠近极星的恒星，必须使用精确的球面三角公式。 - Since cordite burns at a greater rate at a higher pressure a relief valve must be used to allow generated gas to escape to atmosphere at times when the demand is low .
因为柯达火药在较高的压力下以较高的速度燃烧，所以必须使用一个溢流阀，以便当用气少时，能让所产生的部分气体排到大气中去。 - In this case , named parameters must be used
在这种情况下，必须使用命名的参数。