W:Inside a battery are two liquid substances. Power is produced when these two react.
温迪：电池内有两种液态物质，两种物质起化学反应时，就会产生电力。
At the same time, we set up the liquid culture system that produced seedlings.
同时建立了拟南芥幼苗的液体培养体系。
At the same time, we set up the liquid culture system that produced seedlings.
同时建立了拟南芥幼苗的液体培养体系。
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