There have been two failures: The shuttle Challenger and seven astronauts were lost just after launch in January 1986 due to an O-ring seal leak in a solid rocket booster that led to an explosion.

有两次失败的教训：1986年1月刚刚发射过后，一个固体火箭助推器的O型圈密封泄漏导致的爆炸，使我们失去了挑战者号和7名宇航员。

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Choose the correct pictures for Ss - ladybug, wing, leg, brush, seal, seven, sandwich, sand.

从瓢虫，翅膀，腿，刷子，印章，七，三明治，砂这些单词中选择正确的以。

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And when the seven thunders had uttered their voices, I was about to write: and I heard a voice from heaven saying unto me, Seal up those things which the seven thunders uttered, and write them not.

七雷发声之后，我正要写出来，就听见从天上有声音说，七雷所说的你要封上，不可写出来。

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That was as close as they could get as Stewart and UConn scored the next seven points to seal the victory.

NPR: UConn Beats Notre Dame 83-65 To Reach NCAA Final

The 2004 champion dominated from the outset, taking a 5-2 lead before winning the next seven consecutive games to seal the match.

BBC: SPORT | Tennis | Sharapova powers through opener

Asamoah Gyan regained the lead for Sunderland after the break, but the visitors sat back and finally buckled under a barrage of long throws and set-pieces, as two Jermaine Pennant free-kicks set up Huth to score twice in the last seven minutes and seal a remarkable recovery.

BBC: Sunderland boss Bruce fumes at defence & officials