以下兩句句子意思有無分別?

是 " emphasis " 上的分別

1. Water from that well must not be drunk because it has been polluted.
a) SUBJECT 是 "Water from that well".
b) 句子想「強調」的是 "Water from that well" 的「問題」--
What's special about "Water from that well" ? ...... It must not be drunk.

2. Water must not be drunk from that well because it has been polluted.
a) SUBJECT 是 "Water".
b) 句子想「強調」的是 "Water must NOT be DRUNK" 的「問題」--
那兒的 "Water must NOT be DRUNK" ? ...... Water FROM THAT WELL ！

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
相關例子:-
========
1. 老師帶同一班同學去郊野 BBQ, 途中看見一個 井, 隨即提醒同學說 :
Water from that well must not be drunk because it has been polluted.
《理由 : "emphasis" 在於 "Water from that well" 的問題 》

2. 一群爬山人仕正在覓水源飲用, 其間遇見一個 井, 一位資深者提醒各人 :
Water must not be drunk from that well because it has been polluted.
《理由 : "emphasis" 在於 "飲用 Water" 的問題 --- 那裏的 water must not be drunk ? 》

Amendment: The water of that well must not be drunk due to pollution. Yip