collapse in on itself 自重崩壊する

collapse in on itself は「自重に耐えられず、内部に向かって重力崩壊すること」、、、もっと簡単に言えば「自重でつぶれる」。0:20 authorities describing the operation which used 75 kilos of explosives as a success with the building collapsing in on itself and toppling in just seconds, leaving behind a heap of rubble and thick smoke and dust. 75キロの爆薬を使い数秒間で崩壊したこのビル解体工事は見事成功したと関係者は言った。

Condemned high rise implodes in Medellin, Colombia

0:22 stellar mass black holes form when a huge star more than 10 times bigger than our sun burns up all its fuel and collapses in on itself. 太陽の10倍以上の質量の恒星が燃え尽きて自重崩壊すると恒星ブラックホールが生まれる。

Black holes

2:24 rescue workers tell us that what makes this work so hard is these old stone buildings just completely collapsing in on themselves. 古い石造りの建物が崩落するので救助活動が難航していると救助隊員らは言う。

taly Earthquake Death Toll Climbs

1:01 so the moon is cold, remote and slowly collapsing in on itself due to enormous outside pressure. 月の内部は冷め、地球の重力により月震を起こし内部崩壊によって縮んでゆく。

A Woman On The Moon By 2024!

練習問題解答
a-7712 collapses in on itself
b-4034 it collapses in on itself