Infrared observations have shown that the explosion took place in a cavity in space.
红外线观测表明爆炸发生在太空的一个空洞里。
2
The ideal space for a new hive can be difficult to find: the opening should be small, about 10 meters off the ground, and lead to a 40-liter cavity inside a sturdy, living tree.
Traditionally, syringomyelia has been treated with shunting of the cyst by placement of a catheter between the cyst and the subarachnoid space or pleural cavity.