频繁过多地使用就会对使用者造成内在的危害。
Many new drugs are aimed at old people who may already be taking several other pills. Testers have to be sure that they will not interact harmfully.很多新药的目标人群是已经服用多种药物的老年人,测试者须保证药物间不会有混合作用。
In digital terrestrial television system, there is much burst and random noise in the broadcasting channel, and burst noise is more harmfully than random noise.在地面数字电视系统中,广播信道存在着突发噪声干扰和随机噪声干扰,而且前者的危害甚于后者。