on the front line (en la primera línea)

Idiom Military

Meaning

directly involved in the most active or dangerous part of something

directamente involucrado en la parte más activa o peligrosa de algo (directamente involucrado en la parte más activa o peligrosa de algo)

"Doctors were on the front line during the pandemic."

"Los médicos estuvieron en la primera línea durante la pandemia." (Los médicos estuvieron **en la primera línea** durante la pandemia.)

a flight that leaves late at night and arrives early in the...

A source of endless complications or trouble.

it's very easy

The greater the risk, the greater the potential benefit.

Someone who starts using a new product before others.

to make a serious or formal promise