?? 詞語組成解析
cluster
['kl?st?]
n. 叢;簇，串;群;[語言]輔音群;
vi. 叢生;群聚;
vt. 使密集，使聚集;
of
[?v]
prep. 關于;屬于…的;由…制成;
aux. 助動詞 [非標準用語、方言] =have [主用于虛擬語氣];
differentiation
[[?dif?ren?i'ei??n]]
n. 區別, 分化, 變異\\n[醫] 鑒別, 區別, 分化[作用], 微分法
??? 情景例句
Now the hard work begins.
艱苦的工作現在開始了。
What's it like, being and actor?
做為一個演員，你有什么想法？
'Mr. Lane was defeated in the elections.
“萊恩先生在大選中被擊敗了，