英语学习·日积月累-凯发k8官网

¹ disk
软盘 

例句：
floppy disks have always been cheap to make and ² easy to copy.
软盘制作成本比较低，而且拷贝起来也相对容易些。
 

swim against the current (stream)
逆潮流行事；背道而驰
 
例句：
the boy who tries to succeed today without an education is swimming against the stream.
现在，没有受过教育的青年想要获得成功，其难度就好比逆水行舟。
 

i can't believe it.
我简直不敢相信。
　
对话：
a: she beat two world records.
b: that's amazing.
a: it sure is. i couldn't believe it.

a：她打破了两项世界记录。
b：那太令人惊奇了。
a：当然。我简直不敢相信。