1. They will miss the ritual interaction that goes with a welcoming cup of tea or coffee that may be a convention in their own country.
    他们也会怀念那种喝着招待客人的茶或咖啡的礼节性交往, 这也许是他们自己国家的一种习俗。

2. How many delegates have checked in at the convention?
    大会已有多少代表报到？

3. In 1864 a treaty — The Convention of Geneva — was signed and the Red Cross came into being.
    1864年，一项协议——日内瓦公约得以签署，红十字会诞生了。