Central difference notation
[计] 中心差分记法
🧩 词语组成解析
🗣️ 情景例句
Allow me to suggest an alternative.
让我提个其他的建议吧。
I played outside this morning.
我今早在外面玩。
After speaking for about half an hour he came to a sad part of the family history.
大约谈了半个小时之后，他谈到了家族史中的一件伤心事。