上游的英文：
upper reaches
advanced position

参考例句：

The upper Nile
尼罗河上游地区

When the downstream head is greater than about 3/5 of the upstream head, flow is submerged
当下游压头大于上游压头约3;5时，流量是潜流。

rowing upriver;upriver rapids.
划向上游;上游急流

This is the lower reaches of the Nile.
这是尼罗河的上游。

the precipitous rapids of the upper river
河流上游的急流

I live in the upper reaches of the river.
我住在河的上游地区。

Sail up a river,ie against the current
向上游航行(逆流行驶).

A boat steaming up the Nile
向尼罗河上游行驶的汽船

We proceeded to drift on up the river.
我们继续向河流的上游漂流。

The upper reaches of the river are quiet and flow through gentle countryside.
上游的河水平缓地从宁静的乡村流过。

upper是什么意思：
adj. （地位）较高的；上面的，上部的
n. 鞋帮；兴奋剂

His upper arms are strong.
他的上臂很强壮。

having a flat or flattened upper surface.
有平的上表面或使上表面变平的。

I live in the upper reaches of the river.
我住在河的上游地区。

reaches是什么意思：
v. 抵达；达到；伸出（手）；够到；延伸（到）
n. 可及之范围；一段流域；地带；大片地区

reach the bottom
到达底部

Women have not even reached the level of tokenism that blacks are reaching
妇女甚至尚未达到黑人正在达到的象征性水平。

There is no question that a new compromise will be reached.
新的妥协毫无疑问地会达成。

advanced是什么意思：
adj. 先进的，开明的；高级的；年迈的
v. 前进；增加；上涨

Prices are advancing.
各种物价都在上涨。

The advance was sounded.
进军号吹响了。

Petroleum is on the advance.
石油价格正在上涨。