重点讲解：
1. account for （数量或比例上）占；
Computers account for 5% of the country's commercial electricity consumption.
计算机占去该国商业用电的5%Z2t+|*NG!adW。
2. convert into (使)改变；更改；(使)转变；
The signal will be converted into digital code.
信号会被转变为数字代码6j]7wZ6p5RDg]D-。
3. transform into 转换；改变；改造；
Your metabolic rate is the speed at which your body transforms food into energy.
新陈代谢率是身体把食物转换为能量的速度jaNkDGhraY0k]^V|6N4。
4. warm up 使暖和；变暖和；
The weather had warmed up.
天气已经转暖s0!x~lNRYIF;T0h。