| 释义 |
Arbor Day in American English a tree-planting day observed individually by the states of the U.S., usually in spring Arbor Day in American Englishnouna day, varying in date but always in the spring, observed in certain states of the U.S. by the planting of trees Word origin [1870–75, Amer.]This word is first recorded in the period 1870–75. Other words that entered Englishat around the same time include: billing, fifth wheel, linkage, onshore, upgrade |