在半导体收音机中晶体管代替了真空管的英文

in semiconductor receivers transistors take the place of vacuum tubes

• 在:    exist; be living
• 半导体:    semiconductor
• 收音机:    radio; radio set; ...
• 中:    hit; fit exactly
• 晶体管:    transistor; crysta ...
• 代替:    replace; substitit ...
• 了:    finish; complete; ...
• 真空管:    vacuum tube; vacuu ...