best-practices: clarify scheduler pool underutilization wording

best-practices/three-nodes-hybrid-deployment.md

@@ -72,7 +72,7 @@ In this test, the value of this parameter is set to `2`. Observe the **gRPC poll
 
 When TiKV detects that the CPU core number of the machine is greater than or equal to `16`, this parameter value defaults to `8`. When the CPU core number is smaller than `16`, the parameter value defaults to `4`. This parameter is used when TiKV converts complex transaction requests to simple key-value reads or writes, but the scheduler thread pool does not perform any writes.
 
-Ideally, the usage rate of the scheduler thread pool is kept between 50% and 75%. Similar to the gRPC thread pool, the `storage.scheduler-worker-pool-size` parameter defaults to a larger value during the hybrid deployment, which makes resource usage insufficient. In this test, the value of this parameter is set to `2`, which is in line with the best practices, a conclusion drawn by observing the corresponding metrics in the **Scheduler worker CPU** panel.
+Ideally, the usage rate of the scheduler thread pool is kept between 50% and 75%. Similar to the gRPC thread pool, the `storage.scheduler-worker-pool-size` parameter defaults to a larger value during the hybrid deployment, which results in a lower resource utilization rate. In this test, the value of this parameter is set to `2`, which is in line with the best practices, a conclusion drawn by observing the corresponding metrics in the **Scheduler worker CPU** panel.
 
 ![Scheduler Worker CPU](/media/best-practices/three-nodes-scheduler-pool-usage.png)