For example, if you say that something is "a few microns across", explain that a micron is one-millionth of a metre, and "about one hundredth the width of a human hair".
例如，如果您说某事物只有几微米，那么就要解释一微米是百万分之一米，大约是人头发宽度的百分之一。
n. 第一百，第一百个；百分之一
centi