英和和英

a common occurrence

It's just one of those things.

It happens.

the actual facts

There's a reason for it.

occurring from time to time

the root of the matter

of something, the quality of being vague

the condition of going to a place frequently

the important part of something

only about the specific matter

of something, occasionally being of a particular nature

an object that is troublesome and burdensome

matter or event defined by evaluation (unexpected event)

progression of matter (occur, happen)

happening suddenly

of something, a condition of being commonplace

That's the way.

That is common.

That is common.

Difficulties are liable to occur.

a vital or vulnerable point or area

the gap between things

This is common.

an indication

It's a frequent occurrence.

to have the tendency to do something frequently

not infrequently

an extremely important point of a matter

the important part of a thing