The expression to the left of the equals sign is not a valid target for an assignment.怎么翻译

The expression to the left of the equals sign is not a valid target for an assignment.怎么翻译
The expression to the left of the equals sign is not a valid target for an assignment.怎么翻译

The expression to the left of the equals sign is not a valid target for an assignment.怎么翻译
等号左侧的表达式无法被有效赋值.