-----------------------------------
やってくる， やって来る， 遣って来る
1. to come along, to come around, to turn up
2. to arrive at the present, to get where one is, to have been doing something (for a period of time)
tbd
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
