1. sudden
The sudden increase of ultraviolet rays made the researchers believe in the existence of ozone holes.
The sudden increase of cars is causing a large number of traffic accidents every day.
Sudden decrease in appetite is sometimes a sign of illness.
a sudden rise
As I returned from school yesterday, I was caught in a sudden shower.
However, maybe from the sudden change in pressure when you put them, having your ears pop is a problem.
Losing his balance from a sudden gust of wind, the tightrope walker fell to his death.
What Alice, waiting for a reply, was faced with was a sudden howl. It was a resounding noise, sharp as to burst her ear drums, loud as to reach unto the heavens.
When the teacher called on me all of a sudden I got confused and kept stumbling as I spoke.
He was to have dined with us, but he became seriously sick all of a sudden.
There are no car lights to make it softer or less sudden; there are no mothers voices calling for their children to come in now.
Numerous violent and sudden casualties among C++ developers are caused by segmentation faults every year.
Nothing can change the look of a city so dramatically as the sudden appearance of a block of offices which towers above all the surrounding buildings.
There are many theories about the sudden extinction of the dinosaurs, but the real cause still remains anyone's guess.
Why are you telling me about hippos all of the sudden? I don't see the connection between that and your twelve red goldfishes.
2. suddenly
He died suddenly.
All communication with that airplane was suddenly cut off.
This morning I got a telegram from home saying that my father had been suddenly taken ill.
But Dima would never wear the glasses. Suddenly, his body went limp and he collapsed to the floor.
A black crocodile, troubling his rest, grabbed him suddenly by his rough and heavy foot.
What? Are you doubting us? "B-but, that is, suddenly 'spirit world', 'magical beings' - it's strange to ask me to believe."
Since my brother died suddenly two years ago, my sister-in-law has valiantly kept going the small jewellery store he left her.
It is characteristic of the fork ball, one of baseball's change-ups, that a ball that flew straight will drop suddenly just before the batter.
The monkey, having thrown coconuts at all of the animals as a means of amusement, could not understand why he was suddenly being chased out of the jungle.
While looking at the flowers I thought suddenly that humans too had a good side. It's humans who discovered the beauty of flowers and it's also humans who can appreciate them.
If there existed a market for sentences, our grammatical speculations would suddenly make sense.
Hope is when you suddenly run to the kitchen like a mad man to check if the empty chocolate cookie box you just finished an hour ago is magically full again.
The car in front of us suddenly stopped for no reason. Do you think it is easier to give up smoking suddenly or in stages? I think it's easier to give up smoking in stages.
He'd sat down for a moment to rest his weary legs and suddenly looked up and saw an elderly woman before him.
英語 "という言葉внезапно"(suddenly)集合で発生します。
TRKI Vocabulary 401 - 450Lesson National parks