"crumbly"の翻訳日本語へ:

辞書英語-日本

Crumbly - translation :

キーワード : よぼよぼジジイ乾燥

The one over Tunguska was probably made of rock, and that's much more crumbly, so it blew up in the air.

とても砕けやすい小惑星の仕業でそれ故に空中分解しました