近日应该应该该地区暴力事件急增.There has been a recent upsurge of violence in the area.首先是当地居民搬离市中心，继而是商铺，近日各个企业也开始迁出。City centres were abandoned first by residents, then by shops, and latterly by businesses.据报告近日气温将明显下降.It is reported...
然而近代电子学对调谐的频率范围很宽的带通放大器提出很多要求.There is a great deal of demand in modern electronics, however, for bandpass amplifiers.频率是可以调谐的.It is accompanied by a tone.外腔反馈的激光二极管阵列 ( LDA ) 可获得窄线宽 、 可调谐的光谱输出.Linewidth - narrowed, tuna...