VOA慢速英语:'Three-Person Babies' Debate Goes Beyond Science and Religion

organelle – n. a specialized cellular part (as a mitochondrion, lysosome, or ribosome) that is analogous to an organ

controversial – adj. relating to or causing much discussion, disagreement, or argument

modification – n.  the act or process of changing parts of something

impact – n. a powerful or major influence or effect

trait – n. a quality that makes one person or thing different from another

heredity – n. the natural process by which physical and mental qualities are passed from a parent to a child

Caty Weaver reported this story. Kelly Jean Kelly was the editor.