As far as I am concerned the use of stored procedures, database triggers and foreign key restraints is OPTIONAL, not MANDATORY, therefore I am free to exercise my option not to use them.
这样的话，我认为存储过程，触发器，外键是可选的，而不是强迫的，因此我可以自由的选择不去用它们。
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Lenovo has been in talks to buy Packard Bell, but Gateway says it intends to exercise an option, obtained last year, to purchase the firm.