在 + 训练 + 中
训练 (xùnliàn) is a noun meaning 'training' or 'practice.' It refers to systematic instruction or drilling to develop a skill. It is commonly used in sports, military, and educational contexts, as in 在训练中 (during training).
每天的训练非常辛苦,但他坚持了下来。
měitiān de xùnliàn fēicháng xīnkǔ, dàn tā jiānchí le xiàlái.
The daily training was very tough, but he persevered.
她在训练中受了伤,需要休息几个星期。
tā zài xùnliàn zhōng shòu le shāng, xūyào xiūxī jǐ gè xīngqī.
She got injured during training and needs to rest for a few weeks.
这支队伍的训练方法很科学。
zhè zhī duìwǔ de xùnliàn fāngfǎ hěn kēxué.
This team's training methods are very scientific.