而且所有声频均有指向性,声频愈高, 指向性愈强.The higher the acoustic frequency is, the stronger its directivity is.它表现在空间生产力发展的继承性 、 指向性 、 加速性和国际性四个方面.The inheritance that its performance grows in dimensional productivity, directivity, accel...
It is possible, of course, that the converse of this theory may also be true.当然该原理的逆命题也有可能成立。Entailment is the converse of the relation of logical consequence.导出是逻辑推论关系的逆叙.I wanted to appear friendly and approachable but...