粉煤灰保温砌块配合比:jar,jug,pot,tank都是"罐",有何区别?

jar, a glass container with a lid that is used for storing food.
由此可知jar是一种(用于存放食物的) 玻璃罐。
举例：cookie jar饼干罐。
jug，a cylindrical container with a handle and is used for holding and pouring liquids.
由此可知jug是一种用于盛放液体的带手柄的容器。
举例：milk jug牛奶壶。
pot， a deep round container used for cooking stews, soups, and other food.
由此可知pot是一种用于烹调浓汤、沙拉及其他食物的深而圆的锅。
tank， a large container for holding liquid or gas. (盛放液体或气体的) 罐; 箱; 槽
由此可知tank是一种盛放液体或气体的 大型容器。

jar指广口坛子 jug带塞子或盖子的大罐子 pot多指壶 tank多指槽
jar:A cylindrical glass or earthenware vessel with a wide mouth and usually no handles.

广口坛子：一个圆柱体的玻璃或陶瓷的广口且通常无柄的容器

jug:A large, often rounded vessel of earthenware, glass, or metal with a small mouth, a handle, and usually a stopper or cap.
大罐，大壶：陶土、玻璃或金属制成的大容器，常为圆形，有狭嘴及柄，并且通常有塞子或盖子

pot:Any of various usually domestic containers made of pottery, metal, or glass
罐，壶：各种通常由陶瓷、金属或玻璃制成的家用容器

tank:N-COUNT A tank is a large container for holding liquid or gas. (盛放液体或气体的) 罐; 箱; 槽

You should use an English only dictionary to see the difference. (for example http://www.dictionary.com or http://dictionary.cambridge.org/)

jar (CONTAINER)
noun [C]
1 a glass or clay container, with a wide opening at the top and sometimes a fitted lid, which is usually used for storing food:
a jar of coffee/pickled onions
a jam jar

2 UK INFORMAL a drink of beer:
We often have a jar or two at the pub after work.

jarful
noun [C]
the amount that a jar can hold:
The recipe uses a whole jarful/two jarfuls of jam.

jug (CONTAINER)
noun [C]
1 UK (US pitcher) a container for holding liquids which has a handle and a shaped opening at the top for pouring:
a glass/plastic jug
a milk/water jug

2 US a large round container for liquids which has a flat base, a handle and a very narrow raised opening at the top for pouring:
a whiskey jug

3 the amount of liquid that a jug holds:
a jug of milk

jugful
noun [C]
There was a jugful of water on each table.

pot (CONTAINER)
noun [C]
1 any of various types of container, usually round, especially one used for cooking food:
Fill a large pot with salted water and bring it to the boil.
There\'s plenty of cupboard space in the kitchen for all your pots and pans.
See also flowerpot; teapot.

2 MAINLY UK any of a variety of containers, with or without a lid, especially for storing food or liquids:
a pot of cream/jam/paint/ink

3 the amount that is contained inside a pot:
I\'ve just drunk a whole pot of tea!
She\'d made a large pot of chicken soup.

4 used in combination to refer to a container of a stated type:
a coffee pot
a flowerpot
a teapot

5 a dish, bowl, etc. made by hand out of clay

pots
plural noun UK
pots of sth a large amount of something:
She\'s got pots of money (= She\'s very rich).

pot
verb [T] -tt-
to put a plant into a container to grow:
I\'m just going to pot (up) these seedlings.

potted
adjective
1 potted plant a plant which is grown in a pot

2 UK describes cooked food, especially meat or fish, which is preserved in a closed container:
potted meat/shrimps

3 UK INFORMAL describes a form of a story or book that has been made shorter and simpler and contains only the main facts or features:
They publish a potted version of Shakespeare\'s plays especially for children.

potter
noun [C]
a person who makes dishes, plates and other objects from clay, usually by hand on a special wheel

pottery
noun [U]
1 the activity or skill of making clay objects by hand

2 objects that are made out of clay by hand:
They sell pottery and other handmade goods.

tank (CONTAINER)
noun [C]
a container which holds liquid or gas:
a water tank
a fuel/petrol tank

tankful
noun [C]
the amount that can be held by a tank

source: http://dictionary.cambridge.org