What does this machine do, sir。 What does this machine do, sir? It washes the potatoes。 This one is for washing potatoes. Look,This machine cuts the potatoes。
Look, this machine cuts potatoes. Dont touch the machines,please。 Please don't touch these machines. They are dangerous. They are all dangerous.
Sorry sir。 Excuse me, sir. This machine puts the crisps in the bags。 This machine packs potato chips into bags.
translation
Wait,You are a very good class。 Wait a minute, you are an excellent class. You can each have a bag of crisps。 Each of you can get a bag of potato chips. Oh,thank you,sir。 Thank you, sir.
Don't feed the fish。 No fishing. Don't walk on the grass. Don't play ball games here。 It is forbidden to play ball here. Don't talk。 No noise. Don't write on the books。 It is forbidden to scribble on books.