exploit; make use of; to use; to take advantage of; to utilize[cedict]
这些
zhè xiēㄓㄜˋ ㄒㄧㄝ
these[cedict]
空洞
kōng dòngㄎㄨㄥ ㄉㄨㄥˋ
cavity; empty; vacuous[cedict]
作为
zuò wéiㄗㄨㄛˋ ㄨㄟˊ
one's conduct; deed; activity; accomplishment; achievement; to act as; as (in the capacity of); qua; to view as; to look upon (sth as); to take sth to be[cedict]
密闭
mì bìㄇㄧˋ ㄅㄧˋ
sealed; airtight[cedict]
的
deㄉㄜ˙
díㄉㄧˊ
dìㄉㄧˋ
of; structural particle: used before a noun, linking it to preceding possessive or descriptive attributive[cedict]