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(lái)的不便敬請(qǐng)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(lái)篇的博文配上圖片分專題講述我的美國(guó)之行，慢慢上傳，敬請(qǐng)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(jué)中為了檢測(cè)/懷疑/預(yù)防/對(duì)這樣的事件報(bào)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(hào)將會(huì)有個(gè)周期表測(cè)試。
麻省理工公開(kāi)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(huì)不會(huì)談到圣經(jīng),對(duì)之后文學(xué)的影響？
耶魯公開(kāi)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.