例句與造句

1. How long a floss thread should I use ? : There are actually two ways of holding your floss.
2. In fact, after much research C . C . Bass a physician studying microbiology in 1948 developed the first nylon yarn floss thread made up of approximately 35 filaments.
3. Floss thread made from silk was first noted in writings such as that by Levi S Parmley in 1819 who wrote about the use of " waxen silken thread passed through the interstices of the teeth, between their necks and arches of the gums, to dislodge that irritative matter which is the real source of disease ."
4. It's difficult to find floss thread in a sentence. 用floss thread造句挺難的