?? 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;
n. 小炸彈
??? 情景例句
This is Nat Baker,
這是Nat Baker
The target shooting requires the power of concentration.
射擊需要集中精神。
It was not until his third match in 1790 that he finally beat Humphries and became Champion of England.
直到1790年他們第3次對壘，門多薩才終于擊敗漢弗萊斯，成了全英拳擊冠軍。