In the US this is called split-phase instead of dual-phase or 2-phase because early in the 20th century there was a 2-phase system with the phases 90 degrees apart. This is still in use in some areas.

And make Mexico pay for it.

They are spending the cash like a buy-back, but not reducing the number of outstanding shares. So they may be reducing, if not diluting, existing shareholder value.

Remember, you can't put too much water into a nuclear reactor.

The earth rotates approximately 360 degrees in one sidereal day. But since the earth is orbiting around the sun, it needs to rotate approximately 361 degrees per solar day. The leap second is not to account for this difference. The leap second accounts for variation in the mean solar day relative to the average mean solar day when the standard second was established.

And even if I had know the names of the symbols, I didn't see a reason that the expressions should be read from left to right. I just put the big end of the symbol near the bigger number and the small end of the symbol near the smaller number.

Back in kindergarten or first grade, my class did a worksheet on < and >. Each problem was a pair of numbers with a circle between them. We were to put either < or > in the circle. After we completed the assignment, the teacher had us correct our own papers; she would call out "less than" or "greater than" for each problem. I was baffled. I had no idea what she was talking about. Even though I answered every problem correctly, it hadn't occurred to me that these two symbols had names.

And why would you want to express 1/3 inch in 64ths? Pick a more natural unit like barleycorns.

21 1/3 64th, exactly. Now, 1/3 meter in millimeters, please? Most seem to think that the great thing about SI is that it is base ten. I disagree. The only thing special about base ten is that most of us have ten fingers.

It's O scale or no scale.