中国科学家揭示惯用手不是天生的，是后天训练出来的，这一发现有哪些意义？为啥 90% 的人都练成了右手？

also pr. [di4] or [di5] in poetry and songs

training

(bound form) expense; outlay

(modal particle indicating change of state, situation now)

to force; to compel; to coerce

(often followed by 著|着[zhe5]) taking advantage of

to discover; to find; to detect

a posteriori

(used for emphasis) even

to be (followed by substantives only)

to come out

or