"Họ đang đo khối lượng của cát trong phòng thí nghiệm."

Translation:They are measuring the mass of the sand in the laboratory.

September 24, 2016

1 Comment


https://www.duolingo.com/profile/Songve

"the sand" here sounds like there is a bunch of sand all over the laboratory as opposed to a sample.

August 7, 2019
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