Englishfor English speakers
Berlin
Proper noun
—
Berlin is the capital city of Germany.
mechanism
Noun
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A mechanism is the way something works
This research should help us to understand the mechanisms of memory.
This agreement sets out detailed mechanisms for solving disagreement between the two countries.
These two features combine to create a new data retrieval mechanism.
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A mechanism is one moving system within a larger, more complex machine or organism.
The body has a control mechanism to bring down blood-sugar level when it begins to reach unhealthy peaks.
on
Preposition
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positioned at the upper surface of, touching from above
The apple is on the table.
—
at the date of
Tim was born on the 4th of July.
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along, forwards (continuing an action)
drive on, rock on
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about, dealing with the subject of
I have a book on history.
There was a World Summit on the Information Society a few weeks ago.
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touching; hanging from
I have no money on me at the moment.
I would like to eat the fruit on the trees.
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because of, due to
He was arrested on suspicion of bribery.
I contacted Joanne on a hunch that she would know about it.
The stock price increased on news of a new product.
on
Adjective
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If something is on, it is active, functioning or operating.
The television is on.
The lights are on, so it is very bright.
serious
Adjective
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A problem or situation is serious if it is not funny or comical, but important.
This is a serious problem. We must do something.
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A person is serious if the person is not laughing or joking, but saying what they mean.
I see. When you said the room was empty, you were serious!
The woman's face looked serious, so I knew she was saying something important.
emergency
Noun
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An emergency is a serious situation that needs to be dealt with very quickly.
She called 911 to report the emergency to police.
With the new fighting, the president has declared a state of emergency.
He was rushed to the emergency room where doctors operated to save his life.
Some airlines failed to show pilots how to operate emergency exits.
In an emergency, please close your doors and windows and stay calm.
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Emergency is the department in a hospital that takes people with immediate medial needs.
situation
Noun
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A situation is the conditions at a time and place.
If you can stay calm, it will help you to handle difficult situations.
Can you describe the situation in Iraq during the war?
Under the new government, the political situation is changing rapidly.