NOWADAY, A LOT OF IMPORTANT...ARE CARRIED OUT BY SCIENTIST WORKING...

16- - DE VA DAP AN HSG ANH 8 TUYEN CHON
Tiếng Anh DE VA DAP AN HSG ANH 8 TUYEN CHON

16- Nowaday, a lot of important...are carried out by scientist working for large

industrial films. ( invent)