作废 → ☊ 
to become invalid; to cancel; to delete; to nullify ☊ 
khoảng trống 
gap like: Khoảng trống → →
das Leerzeichen ☊ 
khoảng trống ☊ 
☊ A peal of church bells rang out in the distance. ☊ bell ☊
There was only space for a half-dozen tables. ☊ dozen ☊
to fill a vacuum/void ☊ fill ☊
fire sth: A starter's pistol fires only blanks. ☊ fire ☊
a gap in a hedge ☊ gap ☊
There should be a six-inch gap at the bottom. ☊ gap ☊
a gap in the conversation ☊ gap ☊
There were several gaps in my education. ☊ gap ☊
He tried to push his hand through the gap but it wouldn't go. ☊ go ☊
Please answer questions in the space provided. ☊ provide ☊