As.
abbr. 散光（astigmatic）
例句
He's as stubborn as a mule.
他像骡子一样倔。
《牛津词典》
Ebola is not as easily spread as viruses such as smallpox.
埃博拉病毒不像天花这类病毒那样容易传播。
《柯林斯英汉双解大词典》
Run as fast as you can.
你尽量快跑。
