英语中常用的标点符号有:句号(period).。英语的标点符号与汉语的标点符号虽有很多相同之处,但也有一些区别:①英语句号须用实点“ ﹒ ”,汉语则用一小圆圈“。例一:Poly‐lactid acid(PLA)and poly lactid‐coglycolide acid(PLG)microspheres containing TT protein were prepared by the solvent evaporation technique ﹒采用溶剂蒸发技术制备包裹破伤类毒素(TT)蛋白的聚乳 ......