byon Basic wordsalso onCEFR Elementary (A2)? CEFR Intermediate (B1)? CEFR Upper intermediate (B2)? Band 1 (BND1)? Band 2 (BND2)? Band 3 (BND3)? 在旁边,经过, 凭借,经由,被 by by(adverb) 在旁边,经过 by by(preposition) 凭借,经由,被 Forms adverbpreposition by by