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- A passport that is out of date is invalid.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。
- 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。
- 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。
- invalid exchanges 无效交往
- 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
- Cultural exchanges are a way of building bridges between nations. 文化交流是国与国之间建立联系的桥梁。
- 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 invalid found solace in music. 那病人从音乐中得到安慰。
- We hope from now on there will be more exchanges between our two peoples. 希望今后两国人民之间有更多的交往。
- The invalid is gathering strength. 病人的体力正在逐渐恢复。
- This ticket has passed its expiration date, and so it is now invalid. 这张票已过了有效期，现在作废了。
- She has been tied to the house for weeks looking after her invalid father. 几个星期来她一直呆在家中照顾有病的父亲。
- They undertook to promote exchanges and trade. 他们同意促进交流和贸易。
- A claim that a vote is invalid or that a voter is unqualified. 选举无效的声明声称某一投票无效或某一投票人不合格
- The currency of this country exchanges at par. 这个国家的货币可按票面价值兑换。
- Lucy has a summer job waiting on an invalid. 露西找到一份伺候病人的暑期工作。
