the front line

1 line of fighting which is closest to the enemy 前线: [attrib 作定语] front-line troops, units, etc 前沿部队、 单位等. 2 the most important, advanced or responsible position 最重要、 最前面的或责任最重大的位置; 第一线: in the front line of research 处於研究工作的第一线.

the dog-star, the East End, the Eastern Bloc, the elect, the electric chair, the English Channel (also the Channel), the Eternal City, the evening star, the fair sex, the faithful, the fallen, the Far East, the Far West, the few, the fine print, the first person, the First World War (also World War I), the foregoing, the former, the front bench, the generation gap, The Globe, the golden mean, the Grand National, the Great Bear, the Great Lakes, the Great War, the Green Party, the gripes, the Gulf Stream, the handicapped, the high jump, the high sea (also the high seas), the Himalayas, the Holy City, the Holy Father, the Holy Ghost, the Holy Grail, the Holy Land, the holy of holies,