When John was 17, he died of congenital heart disease.约翰17岁时死于先天性心脏病。Today the best tests are performed in the hospital .see chap. 17..现在，本医院可提供最好的化验（见第17章）。He was electrocuted for a murder committed when he was 17.他因17岁...
这家商店出售荧光漆.This shop sells fluorescent paint.玛丽,这位年轻妇人的脸庞也在这可爱的荧光中变得神采奕奕了.The young woman's face was wonderfully changed in this lovely light.在 X 射线荧光法中, 可直接使用滤纸.In X - ray fluorescence, pieces of the filter are used...