Natural radiactivity
[电] 天然放射现象
🧩 词语组成解析
natural
['nætʃrəl]
adj. 自然的;物质的;天生的;不做作的;
n. 自然的事情;（生来的）白痴;[乐]（风琴等的）白键;
natur=nature自然+al...的 →自然（界）的
🗣️ 情景例句
After all, we're here, we're alone, we're together.
毕竟， 我们来到这儿了， 我们又单独在一起了。
He wants to work for a while before he returns to college.
他希望返回学校之前暂时工作一段。
The inspector then asked the old lady to try to check what was missing by the next day and advised her not to stay alone in the flat for a few nights.
巡官请老妇人在次日之前设法查清丢了些什么，并劝她几夜之内不要独自一人在公寓过夜。