Your research grant application needs to be written in clear, assertive language that leaves the reader in no doubt about what you will do and what will be achieved.
There is no room for vague or long-winded language. The reader needs to be told in no uncertain terms what the scientific challenge is, why it needs to be tackled, and why you or your team are the best qualified to take on the challenge.
The reader needs be told how you plan to carry out the work, and be shown your planned route to a successful outcome. Finally, the reader needs to be told how the new knowledge and outcomes will be used.
If these key elements are presented clearly and concisely, your chances of convincing the reviewer that your application should be funded will be much higher.