seal up
中级 (B1) neutral
To close something so tightly that nothing can get in or out
"She sealed up the envelope and left it on his desk."
在语境中听
Magnetic gel injected into the heart could stop strokes
nature video · 1:59
could seal up the appendage preventing
Here's What a Professional Workshop Did to This Old Mercedes E55 AMG
M539 Restorations · 53:52
against the cover or the seal up against
The Unsolved Mystery of Impact Flashes - Smarter Every Day 307
SmarterEveryDay · 39:06
I'm going to seal up all the Argon leak holes.
Nature's Incredible MOTOR - Smarter Every Day 300B
Smarter Every Day 2 · 38:12
they seal up and they don't have enough space for that water molecule to go