单词学习：chums 名词（复数形式）/动词（第三人称单数现在时）
chums
/tʃʌmz/
（名词）密友，好友；（动词）成为好朋友
During the school trip, all the students quickly chums up with each other, and soon they were chatting and laughing like old friends, much to the delight of 顾老师.
在学校旅行期间，所有的学生很快就彼此成为了好朋友，不久他们就如同老朋友一样聊天欢笑，这让顾老师非常高兴。
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