Testcross
n. 测交(一种使杂种子一代与隐性类型交配以测定杂种子一代遗传型的方法)
🗣️ 情景例句
He didn't want to borrow any money.
他不想借钱。
Happens all the time.
常有的事。
From the shore line, out to a distance which may be anywhere from a few miles to a few hundred miles,
从海岸线向大海延伸几英里到几百英里的区域是大陆架慢坡，