英和和英

to yield much―go far

to be doing something

to be doing (something)

It's in...

I have a second string to my bow―two strings to my bow.

to be kept standing

with firmness

to be done

Already there

It's in...

to be vulgar

He has a treasure―boasts a treasure.

to have been engaged in the act of doing something

a state in which something is present at a location

The man of meritorious deeds,

I have a favor.

of another person, being in a particular place other than the place from which one is speaking

The chances are in my favour

There is an inner room.

to do unexpectedly done something

having calluses

I owe money

In a certain place

of a thing, being in a particular place other than the place from which one is speaking

to last long―go far

whoever you may be

（議論なら）a well-grounded argument―（説なら）―an authentic statement.

to be tasteful―elegant

Which means...

I'm doing