历史悠久的,保守的;

Even old-line pharmaceutical houses are offering their versions of brain boosters.
就连老字号的药店也开始推出自制的健脑产品.
来源:互联网摘选The last few months the police have steadily swung back towards their old line.
在过去几个月当中警察已经日益回转到老路上去了.
来源:词典精选例句The families of Hou ethnic were old-line and well known though each experienced its tide.
后族各家族、各支系在辽代的发展,虽在不同阶段各有盛衰起伏,但均称得上与辽王朝相始终的世家大族.
来源:互联网摘选
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