There is no sharp line between health and illness.

在疾病与健康之间没有明确的分界线。

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The world had no sharp horns everywhere, people consciously abide by the traffic rules.

世界到处也没有了刺耳的喇叭声，人们自觉遵守着交规。

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Always insure that there are no sharp edges that could injure the pet and keep in mind that puppies are clumsy.

Always insure that there are no sharp edges that could injure the pet and keep in mind that puppies are clumsy(笨手笨脚的)。

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Though September was perhaps weaker than many economists expected, there was no sharp slowdown during the summer.

ECONOMIST: No longer boom, but not yet doom

Products have gravitated naturally toward slimmer, lighter devices, with rectangular bodies, no sharp edges, larger screens, and touch technology.

FORBES: Apple v. Samsung: The Rights To Rectangles

The state's public-health statistics also show that, unusually, there has been no sharp rise in smoking by young people.

ECONOMIST: The anti-smoking campaign: Look at this | The