If you see humor as an optional form of entertainment, you're missing some of its biggest benefits: humor makes average-looking people look cute and uninteresting people seem entertaining.

如果你认为幽默只是一种可有可无的娱乐形式，那你就忽略了幽默最大的好处：幽默能让长相平平的人看起来更可爱，也能让呆板无趣的人看起来更有趣。

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The distinguished features of the universal life include randomly paying for premium, variable determining manners for cash values and the optional ways of death benefits.

全能寿险具有保费随机缴纳、现金价值确定方式不同，死亡给付方式具有可选性等鲜明特征。

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Today's row over benefits was optional: the government, by all accounts, did not need to have a parliamentary vote on the decision to raise most benefits by only 1% a year between now and 2015.

BBC: Fairness and the welfare bill

For example, Adobe Systems Inc. in San Jose posts its employee benefits online, including deductibles for medical and dental insurance, payroll deductions for optional coverage and details about its sabbatical programs, 401(k) plan, profit sharing and employee stock purchase plans.

CNN: Does your Web site reveal too much?