polyfunctional structure的用法和樣例：
例句
- A polyfunctional monomer is one with three or more functional groups per molecule.
多官能度單體是指每個分子含有三個或三個以上官能團的單體。 - In the second part, heteroarm star-shaped polymers were synthesized by conventional free radical polymerization in two steps by the use of polyfunctional chain transfer agent.
在第二部分中，採用多官能鏈轉移劑通過普通自由基聚合製備了雜臂星形聚合物。
