But personally I believe a business letter should end with Very truly yours, not Sincerely.
还行,乔治。但是我个人相信一封商业信函应该以“敬上”结尾,而不是“谨启”。
But people who are cut off not only from foreign tourists, but even from their own countrymen can be hostile to travellers.
但是,那些不但与外国旅游者隔绝,而且与本国同胞隔绝的人们有可能对游客抱有敌意。