middle reaches of a river; midstream; middle course
Used for the middle part of a river or stream, between 上流 and 下流; depending on context it can also refer to being in the middle of the current.
Small towns are scattered along the middle reaches of this river.
The boat was carried out into the middle of the stream.
Refers to a middle social or economic stratum, as in 中流家庭 or 中流階級. It contrasts naturally with 上流 and 下流 in social-class contexts.
She grew up in a middle-class family.
Many people hoped for a middle-class life.
There is a large bridge in the middle reaches of the Tone River.
They lead a middle-class life.
all-Japanese-are-middle-class mentality