The waiter's face, tanned to a dark brown and deeply wrinkled, reminded Suchen of a walnut shell, yet his eyes, even in the dim light, glimmered with alertness, like the eyes of a mountain lion.
侍者满是皱纹的脸被晒成深棕色，让苏晨想起核桃壳。尽管光线昏暗，他的眼神机警，闪闪发光，像是山上的雄狮。
The sapwood of walnut is creamy white, while the heartwood is light brown to dark chocolate brown, occasionally with a purplish cast and darker streaks.
核桃木的白木质为奶白色，心材则为浅棕至棕黑色，偶有带紫色的出裂纹及较深色条纹。
The diurnal variation of Pn in hebei-walnut was influenced by light intensity, leaf temperature and intercellular CO2 concentration.
影响河北核桃净光合速率日变化的主要因子是光合有效辐射、叶片温度及胞间CO_2浓度。
North American walnut tree having light-brown wood and edible nuts;
北美胡桃树，有浅褐色的木头和可食用的果子；
North American walnut tree having light-brown wood and edible nuts;
北美胡桃树，有浅褐色的木头和可食用的果子；
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