to make a difficult decision or endure something unpleasant
做出一个困难的决定或忍受一些不愉快的事情 (zuòchū yīgè kùnnán de juédìng huò rěnshòu yīxiē bù yúkuài de shìqíng)
"I didn't want to go to the doctor, but I had to bite the bullet."
"我不想去看医生，但我不得不咬紧牙关。" (Wǒ bù xiǎng qù kàn yīshēng, dàn wǒ bùdébù **yǎo jǐn yáguān**.)
to aim for a difficult or ambitious goal
to adopt an environmentally friendly lifestyle
to stay updated or adapt to modern trends
beyond control; off the usual path
I am the one responsible; I will take responsibility.
no matter what happens; in any weather or situation
