低谷 dī gǔ — valley
dī (first tone, high and level) gǔ (third tone, dipping)di1 gu3
valley
Levels 7–9· 2021 three-band, nine-level proficiency standardnoun
Meanings
valley
valley; trough (as opposed to peaks); fig. low point; lowest ebb; nadir of one's fortunes
noun