to launch - to begin something such as a plan or introduce something new, unmanned - a spacecraft that has no people present to operate, pioneer - to be one of the first people to do something, to come across - to find something by chance, to work out - to understand something by thinking about it, to crawl - to move slowly on hands and knees, close to the ground, to dub - to give a name or title, groundbreaking - very new and important, a strand - a thin piece of something, like hair or thread, to be attached to - to be connected to something physically or emotionally, to administer - to give medicine or treatment, to carry out - to do or complete a task, a steady hand - a hand that does not shake, useful for delicate tasks, precision - accuracy and exactness, invasive surgery - a medical operation that involves cutting into the body,

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