立彬の日本語
350--[tbd]
Ｐ波， ピー波， ピーは
1. P-wave (e.g. of earthquake), primary wave
tbd
more...           more words...
先程のはＰ波でした。Ｓ波が来ます。
tbd
That was the P-wave just now. The S-wave is coming.
[More...]