顯然,第一個subject是作為動詞,第二個是作為形容詞.
subject
vt.
使服從, 使隸屬(to)
使受到, 使遭到(to)
adj.
易受... 影響的
受...支配的, 附屬的
以...為條件[轉(zhuǎn)移]的; 須經(jīng)[有待于] ...的(to)
所以,
be subject to：
（1）可能受……的影響,
Flights are subject to delay because of the fog.
(2) 取決于,視……而定,
The article is ready to publish,subject to your approval.
(3) 受……支配,服從于,
All nuclear installations are subject to international safeguards.
be subjected to：
(1)被納入,服從于,順從于,
Most of the Europe was subjected to the Roman Empire in history.
(2) 遭受,
The city was subjected to heavy bombing.