Necessary because the pronunciation of the L and R are very similar, so it is very necessary.
ผลลัพธ์ (ภาษาอังกฤษ) 2:
L & R There is a very similar pronunciation until the same think as.
ผลลัพธ์ (ภาษาอังกฤษ) 2:
L and R are sounding very similar to that as well.