some explanation

When you chase a wild goose, can you catch it? Probably not.
"Chase a wild goose" or "on a wild goose chase" means to make a futile effort.

On the trot – one after the other.
He studied 3 days on the trot.
In AE, we like to use “in a row”. He studied 5 days in a row.

To quit the snake ladder - I have no idea :)

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• thank you. -梅石瑩玉- ♀ (0 bytes) () 11/05/2009 postreply 16:46:37

• 回複：some explanation -YuGong- ♂ (122 bytes) () 11/05/2009 postreply 20:45:33