vital
a.生死悠关的，极其重要的;充满生机的
The work she does is absolutely vital .
她所做的工作至关重要。
vitamin
n.维生素
Try to eat foods that are rich in vitamins and minerals.
尽量吃富含维生素和矿物质的食物。
liability
n.责任[ pl.]负债，债务;不利条件
Tenants have legal liability for any damage they cause.
承租人造成任何损坏都要负法律责任。
liable
a.大概的;有法律责任的;易于…的
The car is liable to overheat on long trips.
这辆汽车跑长途(发动机)容易过热。
