call on someone
phrasal verb with call verb uk/kɔːl/ us/kɑːl/
C1 号召;动员;要求
to ask someone in a formal way to do something
They're calling on all men and boys over the age of 14 to join the army. 他们号召所有14岁以上的男子参军。
formal I now call on everyone to raise a glass to the happy couple. 现在我提议大家为这幸福的一对举杯。