不懂这个句子的结构,

题目

不懂这个句子的结构,
non-null ASCII characters can be represented using only one byte per character.
represent后跟using是什么结构,我只知道be represented by using.

答案

非空ASCII字符要表示出来,只能是用每个字节表示一个字符
找个语法现象很常见的.
-ing 短语作状语,表示伴随状态
类似的还有很多
1.Piles of stones lie in a corner of the courtyard ,waiting to be replaced.=piles of stones are in a corner of the courtyard,and are waiting to be replaced.院子的角落里放着一堆堆的石头,准备做更换之用.句中-ing 短语（waiting to be replaced）用作状语,表示伴随状态.这种含有表示伴随状态的-ing 短语的句子,常常可以改成具有并列谓语动词的句子.
2.又如：Many people stood along the river bank watching th eboat race.=Many people stood along the river bank and watched the boat race.很多人站在河边看赛船.
3.He sat in a chair reading newspapers.=He sat in a chair and read newspapers.他坐在椅子上看报.
4.He often lay on the ground looking at the stars in the night sky.=He often lay on the ground and looked at the stars in the night sky.他经常躺在地上看夜空里的星星.She finished all her work feeling quite relaxed.=-she finished all her work and felt quite relaxed.她完成了全部工作,感到松了一口气.So these animals find a hiding place,sleeping all through the winter.=so these animals find a hiding place and sleep all through the winter.于是,这些动物找一个躲藏的地方,睡一整个冬天.