龚家少爷
trial-and-error英 [ˈtraiəl ænd ˈerə] 美 [ˈtraɪəl ənd ˈɛrɚ] 不断增加;不断摸索例句:They adopted a trial-and-error procedure.
张家阿婆
不断增长的人口数量 The growing population 由于不断增长的人口和私家车数量的剧增,我们的城市变得越来越拥挤。 Our city is becoming increasingly crowded due to the expanding population and the sharp rise in the number of private cars.