区别辨析flow、run、stream与pour

flow、run、stream与pour这些动词均有“流动、涌出”之意。

flow : 侧重水继续不断地往前流，不关心其流量的大小和速度的快慢。

Lava from the volcano was flowing down the hillside.
火山岩浆顺着山坡往下流。
Many short rivers flow into the Pacific Ocean.
许多小河汇入太平洋。
The river flows through three counties before flowing into the sea just south of here.
这条河流在汇入此处正南边的大海之前流经了3个郡县。
With fewer cars on the roads, traffic is flowing (= moving forward) more smoothly than usual.
路上的车少了，交通比平时更通畅了。

run : 指液体向任何方向流动，暗示比flow快而有力。

I can feel trickles of sweat running down my neck.
我可以感觉到津津汗水顺着脖子往下流淌。
Don't cry, or your make-up will run (= become liquid and move down your face).
别哭了，要不然化的妆就要花了。
The walls were running with damp.
墙受潮出现了斑斑渍迹。
The river runs (down) to/into the sea.
这条河流入大海。
The hot tap is running cold (= producing cold water)!
热水龙头竟然流出了冷水！
I turned the tap on and ran some cold water on the burn.
我打开水龙头用凉水冲被烫伤的地方。
I'll run you a hot bath (= fill a bath with water for you).
我去给你放洗澡水。
My nose and eyes have been running all week because of hay fever.
我得了干草热，一星期都在流鼻涕淌眼泪。

stream : 指水或其它液体从源头流出，不断地朝某一方向流动，可用作引申。

There were tears streaming down his face.
泪水顺着他的脸滑落。
One woman was carried from the scene of the accident with blood streaming from her head.
一名头部流血的妇女被从事故现场抬走了。
I've got a terrible cold and my nose has been streaming all week.
我得了重感冒，整个星期都在流鼻涕。

pour : 通常指从高向低或从上向下的急剧流动。也可作引申用。

The bus was pouring out thick black exhaust fumes.
那辆公共汽车排出大量浑浊的黑色废气。
The government has been pouring money into inefficient state-owned industries, and the country can no longer afford it.
政府一直在向效益欠佳的国有企业注入大量资金，国家再也承受不了了。
I felt a sharp pain and looked down to see blood pouring from my leg.
我感到一阵剧痛，低头一看血正从我的腿上涌出。
Refugees have been pouring into neighbouring countries to escape the civil war.
难民大量涌入邻国以逃避内战。
The sweat was pouring down her face by the end of the race.
赛跑结束时汗水顺着她的脸颊滚落。
It looks as though it's about to pour (with rain).
看样子要下倾盆大雨了。
I was standing in the pouring rain for an hour waiting for my bus.
为了等公共汽车我在倾盆大雨中站了1个小时。