pe·tro·le·um jel·ly
noun/pəˌtrəʊliəm ˈdʒeli/
/pəˌtrəʊliəm ˈdʒeli/
(North American English also petrolatum
[uncountable]/ˌpetrəˈleɪtəm/
/ˌpetrəˈleɪtəm/
)- a soft clear substance obtained from petroleum, used to heal (= make better) injuries on the skin or to make machine parts move together more smoothly
矿脂；凡士林