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。

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.

联想收购Packard Bell本已进入谈判阶段，但Gateway声称倾向使用去年获得一项权利，优先收购这家公司。

The third encryption option the books-seller can exercise is to encrypt only the credit card number in Order.xml.

图书销售商可以实行的第三种加密选择是只加密 Order.xml 中的信用卡号。

Wherever possible, mothers and babies should remain together and be provided with the support they need to exercise the most appropriate feeding option under the circumstances.

只要有可能，母亲和婴儿应该始终在一起，并根据情况向他们提供所需支持，以选择使用最适宜的喂养方式。

Option holders must wait for expiration, then make a best guess whether to exercise their options, or allow them to expire.

期权持有人只能等到到期，然后尽可能猜测究竟是执行，还是不执行手中的期权。