您要查找的是不是：
- His claim to ownership is invalid. 他的所有权是无效的。
- A passport that is out of date is invalid. 护照过期是无效的。
- It may take a long time to find a solution to the problem. 也许要花很长时间才能找到解决这个问题的办法。
- His father is a bed-ridden invalid. 他父亲是个缠绵病榻的人。
- He has been an invalid all his life. 他终身残废。
- The invalid gained colour under the doctor's care. 病人在医生的治疗下，脸色逐浙红润。
- The invalid lay propped on the pillows. 那病弱者倚靠在枕头上。
- I simply refuse to conceive of such a solution. 这样的解决办法，我是绝对不考虑的。
- What color is copper sulphate solution? 硫酸铜溶液是什么颜色？
- Mary is sceptical about the solution. 玛丽对这个解决办法表示怀疑。
- His problem did not really admit of any solution. 他的问题真是没有解决的可能。
- The girl spent all her spare time to look after her invalid mother. 这个女孩把她所有的业余时间都用来照顾长期生病的母亲。
- He doped out a solution to the problem. 他想出一个解决该问题的方法。
- The solution to this problem is acceptable. 这个问题的解决方案是可接受的。
- She has come to some most satisfactory solution. 她得到一个非常使人满意的解决方法。
- The solution of sugar was boiling down. 糖水煎浓成为糖浆。
- A defect in a legal document that can render it invalid. 破绽，失效可能导致其无效的法律文件的漏洞
- What color is copper sulfate solution? 硫酸铜溶液是什么颜色？
- The invalid reached for the glass but could not get it. 病人伸手去拿水杯，但是够不着。
- The programmer come up with a solution to the system problem. 程序员想出了一个解决系统问题的办法。
