Doing experiments is difficult 同义句

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Doing experiments is difficult 同义句
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Doing experiments is difficult 同义句
Doing experiments is difficult 同义句

Doing experiments is difficult 同义句
Doing experiments is difficult
= It is difficult to do experiments
做实验很难

It is difficult doing experiments
Experiments are difficult to do.
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It is difficult to do experiments.

it's is difficult to do experiment.