Limit of detection
[化] 检测极限
🧩 词语组成解析
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
🗣️ 情景例句
But personally I believe a business letter should end with Very truly yours, not Sincerely.
还行，乔治。但是我个人相信一封商业信函应该以“敬上”结尾，而不是“谨启”。
What is the total circulation of this publication.
这家刊物总发行量多少？
I can't afford to go to a restaurant every day.
每天都去餐馆吃饭，我真是支付不起。