Affix the blue airmail label and leave the rest to us.贴上蓝色的空邮标签，其余的事情交给我们。Complete the form and affix four tokens to its back.填完该表，在背面贴上4张凭券。Affix the stamp to the upper right corner of the envelope.把邮票贴在信封上的右上角....
二进制the binary system使用二进制标号法实际上只运用1和0两个数.Using binary notation is in fact just manipulating ones and noughts.我们试一试,把这个数本身变成二进制数.Let us try converting the number itself to binary....