既练绕口令，还学到了两个新词thistle&sifter，谢分享。

Thistle

From Wikipedia, the free encyclopedia

  

Thistle is the common name of a group of flowering plants characterised by leaves with sharp prickles on the margins, mostly in the family Asteraceae. Prickles often occur all over the plant - on surfaces such as those of the stem and flat parts of leaves. These are an adaptation that protects the plant against herbivorous animals, discouraging them from feeding on the plant. Typically, an involucre with a clasping shape of a cup or urn subtends each of a thistle's flowerheads.

http://en.wikipedia.org/wiki/Thistle

 

Sieve

From Wikipedia, the free encyclopedia

 

A sieve, or sifter, separates wanted elements from unwanted material using a woven screen such as a mesh or net. However, in cooking, especially with flour, a sifter is used to aerate the substance, among other things. A strainer is a type of sieve typically used to separate a solid from a liquid. The word "sift" derives from sieve.

http://en.wikipedia.org/wiki/Sieve