When we say a cricket is "singing," what is it really doing?
译句：当我们说蟋蟀在“唱歌”时，它实际上在做什么？（答案附在文末）
cricket /'krɪkɪt/ n. 蟋蟀；板球，板球运动
[惯用语]：
play cricket 打板球
cricket bat 板球拍
[例句]：
• Tree crickets use sound to attract mates.
树蟋用声音来吸引配偶。
• The fact is I've never played cricket.
事实就是 我从来没打过板球。
• Have you ever raised a pet? or an insect like cricket?
你有没有养过宠物或者类似蟋蟀的昆虫？
really /'rili/ adv. 实际上，事实上；真正地，真实地
[近义词]：adv. actually, genuinely, literally, truly
[例句]：
• That was a really enjoyable evening.
那的确是一个快乐的夜晚。
• What do you really think about it?
你到底对这事怎么看？
• You could tell that he had really done his homework.
你能看得出他确实做好了充分准备。
rub /rʌb/ vt. & vi. 摩擦, 擦, 擦破；n. 摩擦, 障碍, 磨损处
[惯用语]：
rub shoulders with 与……接触，并肩
rub out 擦掉，擦去
rub elbows 交际，接触
rub up against 接近…
[例句]：
• He rubbed out chalk marks with an eraser.
他用黑板擦擦掉粉笔字迹。
• We rub shoulders with each other everyday.
我们每天会和很多人擦肩而过。
• She slowly straightened up and rubbed her back.
她慢慢站起来揉了揉背。
wing /wɪŋ/ n. 翅膀, 飞翔, 派别；vt.&vi. 使飞, 飞过, 空运
[惯用语]：
right wing 右翼, 右派
on the wing 在飞行中, 奔波着
in the wings 在后方, 在附近, 在舞台两侧
chicken wing 鸡翅膀
take wing 起飞, 逃走, 兴高采烈
[例句]：
• My little birds have already taken wing.
我的小小鸟已经飞出去了。
• I like eating chicken wings.
我喜欢吃鸡翅。
• The birds are on the wing for warmer countries.
鸟儿展翅飞往较温暖的地方。
答案：It is rubbing its wings together.( 它在摩擦翅膀而发出声音。）
