mức độ độc tính 
level of toxicity [ mức ] : level, amount, degree, measure, extent, standard
[ độ ] : (1) about, approximately, around (a time); (2) degree, measure
[ độc ] : (1) alone, solitary; (2) toxic, poison; poisonous, harmful, injurious
[ tính ] : (1) to intend, contemplate, plan to; (2) to count, calculate, compute
Most Common Compounds Set 1:
Most Common Compounds Set 2 :