Yabla video uses of 密闭

guān
shàng
mén
hòu
jiù
形成 xíngchéng
le
密闭 mìbì
de
空间 kōngjiān
After closing the doors, we have a tightly closed space.
比如 bǐrú
shuō
zhè
shì
密闭 mìbì
de
车库 chēkù
For instance, here is a tightly spaced garage.
dàn
口罩 kǒuzhào
de
密闭 mìbì
xìng
jiù
决定 juédìng
le
口罩 kǒuzhào
不可能 bùkěnéng
百分之百 bǎifēnzhībǎi
de
阻挡 zǔdǎng
悬浮 xuánfú
颗粒 kēlì
分子 fēnzǐ
but because the masks are not completely airtight, they cannot block 100% of particles.