您要查找的是不是：
- My deskmate wanted to trade his pen for my book. 我的同桌想用他的钢笔换我这本书。
- He made motions to me to pass the pen. 他向我打手势，要我把钢笔递给他。
- Put down my pen and stop fiddling! 把我的钢笔放下，别用手玩弄！
- She delved in her bag and pulled out a pen. 她在提包里翻找，拿出一枝钢笔。
- Random mating within a breeding population. 自由交配在一个育种群中自由交配
- Charles bought a pen at the dime store. 查尔斯在廉价店买了一支钢笔。
- The widow mourned for her dead mate. 那寡妇为她已故的丈夫服丧。
- Somebody has walked off with my pen. 有人把我的钢笔偷走了。
- Many animals mate in the spring. 许多动物在春天交配。
- He is rooting about for his fountain pen. 他正在寻找他的自来水笔。
- The first mate was studying to become a master. 大副正在学习准备当船长。
- I'm wild about losing my gold fountain pen. 我因遗失了自来水金笔而暴躁不安。
- Pandas rarely mate (with each other) in captivity. 猫熊在豢养环境中很少(彼此)交配。
- Don't make so much fuss over losing a pen. 别为了丢失一支笔就这样大惊小怪。
- The monkey scratched about in its mate's fur for fleas. 那只猴子在另一只猴子身上找跳蚤。
- I've searched high and low for my lost pen. 我到处寻找丢失的钢笔。
- The blackbird sat on the nest waiting for the return of her mate. 黑鹂在巢中等候其雄鸟归来。
- That was only a slip of the pen. 那仅是笔误。
- Mating blackbirds will defend their territory against intruders. 黑鹂交配时不容许地盘受到外来的滋扰。
- I can't find my pen though I've looked everywhere. 我到处找那支钢笔,可就是找不到。
