随着非洲的封锁 一些援助物资受到威胁

locust – n. a type of grasshopper that travels in large groups and can caused destruction by eating crops

swarm – n. a large group of bugs

pesticide – n. a chemical that kills bugs

lockdown – n. to completely shut down a community

outbreak - n. the sudden appearance of a disease

catastrophic - adj. something that is terrible for many people

shipment - n. an item that is sent from one place to another