Clive wrote: Proceeding from the top to the bottom, the structure consists of a layer of A, a layer of C, a layer of B, the core, a layer of B, a layer of C and a layer of A. Clive This is very accurate. I should've made it clear,

Hoa Thai wrote: We still need to figure out a way to describe the fact that on the top side of the core A is on top - while on the bottom side of the core, B is on top. Of course, to describe the exact configuration we might have to add one

A composite material has a stacking structure, where A, B, C denote different types of stacked layers as shown: A -------------------- (top) C -------------------- B -------------------- Core -------------------- B -------------------- C

Avangi wrote: The gun amnesty, allowing people to turn in their illegal guns without risk of prosecution, will be effective March 1 for one day only. I just don't like become and from in the same construction. To me, "become" does

Marius Hancu wrote: said he is is correct, but not the strictest. It's used when you want to make the said text more vivid. Sounds rather informal to me, or, news-wise style...

Nona The Brit wrote: No, because when you use 'each' it means that A is extended to both 60 and 90 days, and B is extended to both 60 and 90 days - an impossibility. Gotcha!

Nona The Brit wrote: Effective from is quite a normal phrase here. You'll often find it in business contexts as a formal way of stating something (for example a new policy/procedure) will start from . Nona, I thought so.

Avangi wrote: I'm very anxious to hear what our British members have to say. Being effective is one thing; becoming effective is quite another. To me, S2 is a misuse of become . But of course if enough people say it, it becomes the law.

Mister Micawber wrote: The resultant percentage of iron hammerheads can be the same in all 3 of your sentences ( typically, usually, often )-- but the expected percentage decreases in the order in which I have listed the 3 adverbs. Typically

Avangi wrote: I don't believe I've heard S2, but I could be wrong. That's quite helpful, Avangi. I've found quite a few usage of "effetive from + date" in UK governmental websites, suspect it British English?