HSK 3.0 11000 CHINESE WORDS
ENGLISH 6000 THEME WORDS
OXFORD 5000 CORE WORDS
TANAKA 6000 CORE WORDS
biết đấy mà phải ngậm tăm 
to know it but to be forced to keep silence
[ biết ] : to know, know how to do (something) be aware of
[ đấy ] : there, at that place; that
[ mà ] : but, which, where, that, and
[ phải ] : (1) correct, right (opposite of left), right (opposite of wrong); (2) must, have to
[ ngậm ] : to hold, keep; to bear, endure; to close (mouth, lips)
[ tăm ] : bubble, trace, toothpick
biết đấy mà phải ngậm tăm to know it but to be forced to keep silence [ đấy ] : there, at that place; that
[ mà ] : but, which, where, that, and
[ phải ] : (1) correct, right (opposite of left), right (opposite of wrong); (2) must, have to
[ ngậm ] : to hold, keep; to bear, endure; to close (mouth, lips)
[ tăm ] : bubble, trace, toothpick