Know one's onions
精明
🧩 词语组成解析
know
[no]
v. 知道;了解;认识;确信;
n. 知情;
a. 人们的；自己的
n. 奥尼恩斯（姓氏）；奥尼恩斯（英国语言学家、词典编纂家）
🗣️ 情景例句
Oh, OK.
噢 ，好的。
I've been part of this project since its beginning.
从一开始我就参与这个计划。
Alternatively, if the star were small, the life-supporting planet would have to have a close orbit round it and also provide the perfect conditions for life forms to develop.
反之，如果恒星很小，维持生命的行星就要在离恒星很近的轨道上运行，而且要有极好的条件才能使生命得以发展，