Billion-dollar grass
䅟；䅟子
🧩 词语组成解析
billion
['bɪljən]
n. 十亿 ; 数以十亿计;大量;
dollar
['dɑlɚ]
n. 美元;一元纸[硬]币;金钱;财富;
grass
[ɡræs]
n. 草，青草;草地，草坪;告密者;〈俚〉龙须菜;
vt. 用草覆盖;使…长满草;使…吃草;
vi. 渐渐被草覆盖;放牧;
🗣️ 情景例句
I could tell something was up by the look on their faces.
我一看他们的脸色就知道有事。
He reads a book every day.
他每天都读一本书。
But here we come up against the most difficult of all obstacles to contact with people on other planets ----the astronomical distances which separate us.
然而，在和外星人联系中我们遇到的最大困难是分隔我们的天文距离。