is,Bread and butter是配套在一起的,算作一个东西
are,Chicken and fish是两样东西
补充:
The teacher and writer is over there.这个人既是作家又是老师,是一个人
The teacher and writer are over there,作家和老师
is,Bread and butter是配套在一起的,算作一个东西
are,Chicken and fish是两样东西
补充:
The teacher and writer is over there.这个人既是作家又是老师,是一个人
The teacher and writer are over there,作家和老师