If one learns without thinking, one will be lost in his learning. That is, if one does not think about what one learns, he will not arrive at the truth of it.

breath / live / give birth / nurture / spread, multiply / rest / come to an end

to touch; to contact

transmission, a gearbox (a mechanical assembly of gears that changes the torque and speed of shaft rotations)

(organic chemistry) benzoic acid

irregularity, unsteady, disorderly

(figuratively) volatile, critical, dangerous, touch-and-go

一挙手一投足: each and every individual action, every movement

each and every individual action, every movement

a flexor carpi ulnaris