There is a big s_______ lab behind the teaching building.

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Thereisabigs_______labbehindtheteachingbuilding.Thereisabigs_______labbehindtheteachingbuilding.Ther

There is a big s_______ lab behind the teaching building.
There is a big s_______ lab behind the teaching building.

There is a big s_______ lab behind the teaching building.
science lab科学实验室.

scales