误We have a great variety of ink.
正We have a great variety of inks.
析ink是物质名词,通常是不可用复数形式的; 但如果说一种红墨水,一种蓝墨水,一种黑墨水等,那么就可用作可数名词,也可用于复数形式。
用墨水写。误Write it with ink.
正Write it in ink.
这封信要用墨水写。误The letter is to be written with ink.
正The letter is to be written in ink.
析说“用什么工具”,用 with。但说“用墨水”“用各种颜色、油画颜料等”,该用in。