乔木，对20米高；树皮灰色的或灰棕色。
乔木给10米高；树皮灰色的或灰棕色，平滑。
白色木质且光滑的一种五针松，幼树树皮呈浅灰色；特别指东部白松。
Any of several5-needled pines with white wood and smooth usually light gray bark when young; especially the eastern white pine.
一些沉浸在读书中的男生靠在刚有树芽从灰色树皮中长出的树上。
Some boy students who were absorbed in reading leaned against the trees with buds peeping out from within the gray barks.
一些沉浸在读书中的男生靠在刚有树芽从灰色树皮中长出的树上。
Some boy students who were absorbed in reading leaned against the trees with buds peeping out from within the gray barks.
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