词汇精选：weak的用法和辨析
一、详细释义：
adj.
[经]疲软的
例句：
If the wireless business turns weak, a whole country is at risk, not just a single company.
如果这家无线通讯公司变得疲弱，那么整个国家就会面临风险，而不仅仅是这一家公司。
例句：
When the economy is weak, it's very hard for suppliers to raise their prices.
经济疲软时供货商很难提价。
虚弱的，无力的
例句：
Mother was so weak after her operation that she had to lie up for a month.
手术后母亲非常虚弱，以致要卧床一个月。
例句：
His arms and legs were weak.
他的四肢虚弱无力。
软弱的；不中用的，愚钝的
例句：
They are weak-minded, and the established impresses itself upon them easily.
他们脑筋迟钝，正统思想很容易在他们脑瓜上打上烙印。
例句：
He is rather weak-willed and would easily fall through temptation.
他意志薄弱，很容易受诱惑而堕落。
不牢固的
例句：
Flours with strong gluten absorb more water than do flours with weak gluten.
含有强有力的面筋的面粉较含有不太牢固的面筋面粉要吸收更多的水分。
例句：
The structure will prove weak in service.
该构件在使用中将被证明是不牢固的。
淡薄的
例句：
The plateau's air is very weak, it is difficult to survive.
高原空气稀薄，难以生存。
例句：
I just need a cup of weak tea.
我只需要一杯淡茶。
二、词义辨析：
weak,feeble,frail,fragile
这些形容词均有“虚弱的，乏力的”之意。weak普通用词，指缺乏应有的力量，可用于身体、意志或精神。feeble指身体衰弱无力，精力几乎耗尽，含令人怜悯的意味。 frail多指因经常生病而身体纤弱。fragile可与frail换用，但语气强，侧重脆弱，指人容易生病，指物容易破碎。
三、相关短语：
weak force
[物] 弱相互作用(基本粒子之间的一种基本相互作用)
weak interaction
[物] 弱相互作用(基本粒子之间的一种基本相互作用)
weak point
弱点
weak spot
弱光点，疵点，薄弱点
四、参考例句：
He has weak eyes.
她的视力不佳。
Geography was my weak subject.
地理是我的弱项。
He has a weak liver.
他的肝脏不好。
She is weak in grammar.
她语法很差。
His defence was rather weak .
他的辩护是相当无力的。
Rosa is weak in Maths.
罗莎数学比较弱。
His arms and legs were weak.
他的四肢虚弱无力。
The aviation was lamentably weak and primitive.
这些航空设施极其薄弱简陋。
Your love is also your weak point.
你的爱同时也是你的弱点。
The strong usually dominate the weak .
强者通常统治弱者。
