be on about

基本解釋

The website will be on in about 3 days, we are apologized for any inconvenience.
網(wǎng)站將在3天內(nèi)恢復(fù)，給您帶來的不便敬請諒解！
I will be putting on about 10 articles in following days to tell my tour in America with photos took by myself.
我將以大約十來篇的博文配上圖片分專題講述我的美國之行，慢慢上傳，敬請關(guān)注。
blog.sina.com.cn
NET exceptions are suppressed, swallowed or passed unnoticed in order to detect/suspect/prevent/be on alert about such incidents.
網(wǎng)絡(luò)異常抑制，吞食或不知不覺中為了檢測/懷疑/預(yù)防/對這樣的事件報警。

But children also need to learn about the possible threats that can be found on social networks and other sites.
A remember about the Periodic Table test which will be added next week on the 23rd.
我要提醒你們,下周23號將會有個周期表測試。
麻省理工公開課 - 固態(tài)化學(xué)導(dǎo)論課程節(jié)選
Student: Will we be talking somewhat about the legacy of the Bible on later literature or in the context?
學(xué)生：我們會不會談到圣經(jīng),對之后文學(xué)的影響？
耶魯公開課 - 新約課程節(jié)選

From that we can estimate the Android 4 and above would be on about 22% of smartphones which is still above the iOS marketshare of 17%.
FORBES: 4 Key Areas For Apple and Its Future

If you ask someone what they are on about, you are asking that person, often in a slightly annoyed way, what they mean.