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- A passport that is out of date is invalid.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。
- invalid motivation 激励失效
- 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。
- 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
- The invalid reached for the glass but could not get it. 病人伸手去拿水杯，但是够不着。
- A powerful motivation or impulse. 冲动一种强烈的动机或冲动
- The invalid found solace in music. 那病人从音乐中得到安慰。
- Definite goal endows your motivation. 目标可转化为动力。
- The invalid is gathering strength. 病人的体力正在逐渐恢复。
- They lack the motivation to study. 他们缺乏学习的积极性。
- Stress depletes both energy and motivation. 压力不仅消耗体力而且让你丧失动力。
- 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。
- 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
- What is the motivation behind this sudden change? 这种突然转变背后的动机是什么?
