Serum-free culture
[化] 无血清培养
🧩 词语组成解析
serum
['sɪrəm]
n. <医>血清，血浆;浆液，树液;乳清;
free
[fri]
adj. 自由的;免费的;免税的;空闲的;
adv. 免费地;自由地，无拘束地;一帆风顺地;
vt. 免除;释放;使自由;解救;
🗣️ 情景例句
To advertise during prime time TV is very expensive.
在电视的黄金时段买广告是很贵的。
The snake curls up.
蛇盘成一团。
He was constantly on the move, drawing the Danes after him.
他的部队不停地移动，牵着敌人的鼻子，让他们跟着跑。