大使: ambassador, envoy...
沉: to submerge, to immerse, to sink, to keep down, to lower, to drop, deep, profound, heavy...
平台: platform, terrace, flat-roofed building...
前后: around, from beginning to end, all around, front and rear...
除去: to eliminate, to remove, except for, apart from...
郊游: to go for an outing, to go on an excursion...
清晰: clear, distinct...
