英和和英

challenge aggressively

Challenge difficulties

a challenge

took up the gauntlet

to challenge hardships

challenge in turn

challenge

hands‐on experience

to accept a challenge―take up the gauntlet

to accept a challenge―take up the gauntlet―take up the glove

rise to a challenge

rise to a challenge

a bold challenge

face tough challenges

Rise to the challenge

give the challenge

to face a challenge seriously

issue a challenge to

the challenge was formidable

to challenge a difficult problem

toilsome practices

a difficult task

a difficulty that is hard to deal with

operational difficulties

a way out （of the difficulty）

a solution of the difficulty―a way out （of the difficulty）

involved in difficulties

strenuous exercise

to solve a difficulty

earnest affairs