diff --git a/Cloud-Tier.md b/Cloud-Tier.md
index 1be9314..77d9905 100644
--- a/Cloud-Tier.md
+++ b/Cloud-Tier.md
@@ -3,11 +3,11 @@ Cloud storage is an ideal place to backup warm data. Its storage is scalable, an
 
 SeaweedFS is fast. However, it is limited by available number of volume servers. 
 
-One good way is to combine SeaweedFS with the cloud storage.
+One good way is to combine SeaweedFS' fast local access speed with the cloud storage's elastic capacity.
 
 Assuming hot data is 20% and warm data is 80%. We can move the warm data to the cloud storage. The access for the warm data will be slower, but this can free up 80% servers, or repurpose them for faster local access, instead of just storing warm data with little access. This integration is all transparent to SeaweedFS users.
 
-This transparent cloud integration literally gives SeaweedFS unlimited capacity, in addition to its fast speed. Just add more local SeaweedFS volume servers to increase the throughput.
+With fixed number of servers, this transparent cloud integration literally gives SeaweedFS unlimited capacity, in addition to its fast speed. Just add more local SeaweedFS volume servers to increase the throughput. 
 
 ## Design
 If one volume is tiered to the cloud,