VOA慢速英语:Is a Fusion Nuclear Reactor Coming Soon?

prototype – n. an original model on which something is patterned

sustain – v. to provide what is needed for something or someone to exist, continue, etc.

radioactive – adj. having or producing a powerful and dangerous form of energy called radiation

isotope – n. any one of various forms in which the atoms of a chemical element can occur

fuse – v. to join or become joined because of heat or a chemical reaction

Now it’s your turn to use these Words in This Story. In the comments section, write a sentence using one of these words and we will provide feedback on your use of vocabulary and grammar.