1. On a more serious note, some experts argue that couples who have difficulty having a baby could make copies of themselves.
    有些专家用更为严肃的语气争辩说，那些生育孩子有困难的夫妇可以复制他们自身。

2. Let us suppose that you are preparing a meal and keeping an eye on the baby at the same time.
    假设你在做饭，同时又在照看孩子。

3. I have to take care of my baby tonight because my husband is in the South.
    今晚我必须照顾小孩,因为我的先生在南部.

4. I read in the newspaper and in my gardening magazine that the ends of cigarettes are so poisonous that if a baby swallows one, it is likely to die,
    我在报纸及我订阅的园艺杂志上看到, 烟蒂的毒性是很强的：一个婴儿如果吞下了一个烟蒂，就很有可能会死去；

5. I don't tell her that he's not my baby because I'm tired of explaining.
    我没告诉她他不是我的孩子，因为我懒得解释了。