A new embryo starts as a single cell with perfect symmetry.

胚胎是从一个完美对称的单细胞开始的。

youdao

Creating the perfect solar cell (i.e. a cell that's both efficient and cheaply produced) is certainly a work in progress.

研制完美太阳能电池(即制造起来又高效又便宜的电池)方面的工作无疑在进展中。

youdao

I plan to live without a car until I find the perfect hybrid, electric or fuel cell vehicle that won't break my bank account.

我打算维持这种生活方式，除非我找到了更好的混合，电的或者燃料电池并且不会超出我的财力的机动车。

youdao

When I talked about mitosis, I talked about cells making perfect copies of each other, so each parent cell becoming two daughter cells that are the same.

我讲有丝分裂的时候,谈到过细胞能够完美的复制自己,母细胞分裂成为,两个完全一样的子细胞

耶鲁公开课 - 生物医学工程探索课程节选

Nokero's SunRay Pro Power solar charger is perfect for keeping a cell phone charged, and for every Emergency Power Kit Voltaic sells it is donating a kit to an individual in need.

ENGADGET: Inhabitat's Week in Green: self-sustaining homes, wooden wind turbines and the world's first solar-powered nation