中文词 · Chinese word
必不可少
bì bù kě shǎo — absolutely necessary; indispensable; essential
HSK 3.0 L7, HSK newest L7 · study the lists
中文词 · Chinese word
bì bù kě shǎo — absolutely necessary; indispensable; essential
HSK 3.0 L7, HSK newest L7 · study the lists