WorldHelloDayEveryNovember21isWorldHelloDay, 61 peoples...
问题详情：WorldHelloDayEveryNovember21isWorldHelloDay, 61 peoplesayhellotoeachothertoexpressfriendlinessandlove.WorldHelloDay 62 (found)in1973byBrianandMichaelMcCormack,in 63 (respond)totheconflic...