v.消失( vanish的第三人称单数 );突然不见;不复存在;绝迹;
例句:
When this tensor vanishes, the space is calleda flat.
当这一张量为零时,空间叫做平直空间.
The parting sadness vanishes slowly, and she is woebegone all day.
离愁难消, 她整日愁眉苦脸的.
With this said, the old man vanishes out of sight.
老人话一说完, 就忽然不见了.