In Yosemite, researchers used eDNA to track and remove invasive bullfrogs.

在优胜美地国家公园，研究者用环境 DNA 来追踪和清除入侵的牛蛙物种。

In the late evening, when the big bullfrogs were calling trooonk across the still lake, he would think of Serena.

深夜，当大牛蛙呱呱叫着蹦在静寂的湖上的时候，他也会想起塞蕾娜。

Crickets chirped and bullfrogs whooped in the darkness behind the overgrown sidewalks.

在杂草丛生的人行道后面的黑暗中， 蟋蟀鸣叫，牛蛙鸣叫。

Then his voice went deep, deep down, deeper than the very oldest bullfrog's.

然后他的声音变得低沉， 低沉，比最老的牛蛙的声音还要低沉。

I stopped first to check in with Officer Croaker, the bullfrog chief of police.

我先停下来向牛蛙警察局长克罗克警官询问情况。

" Fine, let's swap, " said Hermione, seizing Ron's raven and replacing it with her own fat bullfrog.

“好，我们交换。”赫敏抓过罗恩的乌鸦换掉了她那只肥青蛙。

There was an oblong pool with stone, waterlilies in it and a big stone bullfrog sitting on one of the leaves.

有一个长方形的石头池塘， 里面种着睡莲， 一只大石牛蛙坐在其中一片叶子上。

He jabbed at the bullfrog so hard that he poked it in the eye: the frog gave a deafening croak and leapt off the desk.

他刺得用力过猛，戳到了青蛙的眼睛，青蛙发出一声震耳欲聋的大叫，从桌上蹦了下去。

" I cant take you down home, bellering like you is" . T. P. said. " You was bad enough before you got that bullfrog voice. Come on" .

“我不能带你回家，像你一样大喊大叫”。 T. P. 说。 “在你得到牛蛙的声音之前，你已经够糟糕了。来吧”。

Acting as though it could not see them, it shuffled hunchbacked, slowly and doggedly, towards the far end of the room, muttering under its breath all the while in a hoarse, deep voice like a bullfrog's.

他就像看不见他们似的，弓着背，拖着脚，慢慢地、一步一步地朝房问那头走去，一边用牛蛙般沙哑、低沉的声音不停地轻声念叨着。