When learning computer programming, I found it helpful to look at a function like a pencil sharpener. A parameter was a dull pencil, inside processes sharpened and returned a sharp pencil.
我在学编程时，常把程序比作卷笔刀，而把参数比作钝铅笔，经过处理我们就得到尖铅笔了。
Dull tools can be more hazardous than sharp ones, since it takes more force to cut with a dull blade.
钝工具比锋利工具更为危险，因为使用钝刀片切割需用更大的力气。
This invariably wins him the admiration and respect of students, for he adds colour to the dull class with a sharp sense of humor.
他总是赢得同学们的钦佩和尊敬，因为他以极强的幽默感为我们平淡的课堂增添了色彩。
If you are chopping wood in your dream with a sharp axe you will meet a new companion but if the axe is dull, you will not be able to depend on this person.
如果您是斩木在自己的梦想与夏普开刀，你会满足一个新的伴侣，但如果开刀是枯燥乏味，你将无法依赖于这个人。
If you are chopping wood in your dream with a sharp axe you will meet a new companion but if the axe is dull, you will not be able to depend on this person.
如果您是斩木在自己的梦想与夏普开刀，你会满足一个新的伴侣，但如果开刀是枯燥乏味，你将无法依赖于这个人。
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