Melting & Kev Sib Koom Ua Naphthalin Kev sim
Txhawm rau qhia cov txheej txheem melting thiab solidification ntawm naphthalene.
Sau koj cov lus ntawm no thiab xa rau peb
Txhawm rau qhia cov txheej txheem melting thiab solidification ntawm naphthalene.