a)if someone or something is subject to something, especially something bad, it is possible or likely that they will be affected by it 易受某人[某事]影响;可能会…的
All flights are subject to delay.
所有航班都有可能延误。
Prices are subject to change.
价格有可能变化。
b)DEPEND ON/RELY ONif something is subject to something such as approval, it depends on that thing happening before it can happen 取决于某人[某事],视某人[某事]而定
The funding is subject to approval by the Board of Education.