The temperature under the shade tree can be up to 20 degrees cooler than standing in the direct sunlight.
树荫下的温度甚至会比太阳直射的温度低20度。
A North American deciduous tree (Ulmus Americana) having double serrate leaves and winged fruits. It is grown chiefly as an ornamental shade tree but often dies from Dutch elm disease.
一种北美落叶树(美洲榆)，有双齿叶和双翼果，主要作为观赏性浓荫树，但常患荷兰榆树病而坏死。
A poplar tree of hybrid origin, with sticky, aromatic, resinous buds and heart-shaped leaves, cultivated as a shade tree.
一种普通的杂交树，有粘的、芳香的、树脂状的芽和心形的叶子，做为遮荫树养植。
A poplar tree of hybrid origin, with sticky, aromatic, resinous buds and heart-shaped leaves, cultivated as a shade tree.
一种普通的杂交树，有粘的、芳香的、树脂状的芽和心形的叶子，做为遮荫树养植。
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