This is the 5896th most frequent Chinese word.
塑膠
Plastic.
In this sentence, '塑膠' refers to the material plastic used to manufacture items.
這個瓶子是用塑膠做的。
This bottle is made of plastic.
Here, '塑膠' metaphorically describes something as synthetic or fake, highlighting an insincerity.
她的笑容看起來很塑膠,很不自然。
Her smile looks very fake, quite unnatural.
In this usage, '塑膠' represents the revolutionary industrial material plastic that brought significant societal changes.