1) and they are available in a great variety of models and sizes.
它们有多种型号。
2) They are made in different sizes.
它们有各种尺寸。
3) How high is it?
它有多高？
4) They are close to disappearing.
它们濒临绝种。
5) They are effective in relieving pain.
它们止疼很有效。
6) They are full of knowledge.
它们有知识性。
补充资料：它们
1.代词。称不止一个的事物。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条