这个条款是啥意思啊

雷囧

you may notify the vendor of your intention not to be bound by the contract for the sale of land unless you have, before signing the contract, received independent advice from a legal practitioner  and the legal practitioner has signed a certificate in the prescribed form as to the giving of that advice

我合同法的书还在，可以借你看看，自取，你懂得

something like, if you sign the contract by yourself and have little knowledge as to what's in it, you can back out the contract by letting the purchaser know your intention (within a reasonable time frame, of course), but if you've already obtained legal advice before signing up, you are bound at the moment of signing! in such case, there is no cooling off period, or you waived your right of cooling off.