功夫不负有心人，四月初槐树上现出花蕾，花蕾是青嫩的绿色，如串串翡翠，青翠欲滴。
O O O O B-Person I-Person I-Person O B-Time I-Time I-Time B-Location I-Location I-Location O O B-Thing I-Thing O B-Thing I-Thing O O O O O O O O O O B-Thing I-Thing O O O O O O