birch
/bɜːrtʃ/
a tree with smooth bark and thin branches, that grows in northern countries
桦树；白桦树
poplar
/ˈpɑːplər/
a very tall straight thin tree that grows very fast
杨树
elm
a type of large tree with broad leaves
榆树
chestnut
/ˈtʃesnʌt/
a large tree with spreading branches, that produces smooth brown nuts inside cases which are covered with spikes
栗树
