O, çaba eksikliği nedeniyle başarısız oldu.
- He failed due to lack of effort.
Hazırlık eksikliğinden sınavda başarısız oldu.
- He failed in the examination for lack of preparation.
... wrong about my first premise, that there was a lack of will. ...
... disappointed with the lack of progress I've seen in the last four years. However, I do ...