慢速英语:Can We Reduce HIV Infections to Zero?

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turned a corner - fig. to pass a critical point in a process

trajectory – n. a path, progression, or line of development resembling a physical trajectory <an upward career trajectory>

bone marrow transplant - medical  A bone marrow transplant is a procedure to replace damaged or destroyed bone marrow with healthy bone marrow stem cells. Bone marrow is the soft, fatty tissue inside your bones. The bone marrow produces blood cells.

formula ­– n. a plan or method for doing, making, or achieving something

stigma – n. a mark of shame or discredit

intravenous – adj. through, in, or into a vein; entering the body through a vein