they're swelling up hugely 它們大面積地膨脹開來

swell up膨脹

Her ankle swelled up after the fall.

她跌倒后腳踝腫了起來。

Don't prick that boil; allow it to swell up and burst.

不要挑破那個癤子; 讓它腫起來自己破裂好了。

investigates what happens to food at the microscopic level when it's cooked.從顯微水平上研究食物被烹煮熟后的變化

happen to發生

How could this happen to me!

我怎么會遇到這種事啊！

She places a piece of raw potato under a microscope她將一片生馬鈴薯置于顯微鏡下

a piece of一張(片； 塊； ... )

Would you please give me a piece of paper?

能給我一張紙嗎？

I was hurt by a piece of falling masonry.

我被掉下來的一塊建筑用石塊砸傷。