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质量不灭
 质量不灭
tech. conservation of mass
| 定律
 10% 定律
tech. law of ten percent
 10%定律
desert. ten percent law
 18定律
fin. Rule of 18
 定律
busin. fixed law
econ. theorem
eng.geol. canon
hydroel.st. law; principle
met. rule

to phrases
质量不灭 zhìliàng bùmiè
tech. conservation of mass
质量不灭
: 3 phrases in 2 subjects
Chemistry1
Technology2