1. Arsenic is considered a metalloid due to its properties that are intermediate between those of metals and nonmetals.
砷被认为是一种类金属元素，因为它的性质介于金属和非金属之间。

2. Silicon is a well-known metalloid that is used in the production of computer chips.
硅是一个广为人知的半金属，在计算机芯片的生产中被使用。