pron.

1. （指已提及或心目中的人或事物）這，那，它
   This is our new car. I bought it yesterday.

   這是我們的新車。我昨天買的。

2. （指無生命物，動植物，性別不詳的幼孩等）它
   What a beautiful baby -- is it a boy?

   多漂亮的孩子啊，它是男孩嗎？

3. （作無人稱動詞的主詞）表示時間氣候或距離等
   It's about 50 kilometers from here to my ranch.

   從這兒到我的牧場約有五十公里。

   It's early yet.

   還早呢。

   It's very hot.

   天真熱。

4. （置於句首或句中）引導片語或子句
   I'd think it well worth while to go.

   我覺得很值得一去。

5. （作為形式上的主詞或受詞）用於表示強調的句型中
   But here it's my word that counts.

   但這裡是我說的話算數。

6. （用於某些動詞，介系詞後面）構成習慣語
   Don't lord it over your friends.

   不要對你的朋友擺威風。

n.[U]

1. （捉迷藏等遊戲的）捉人者，猜的人
2. 【口】（僅用於gin and it）義大利苦艾酒
3. 【口】關鍵，重要時刻
   This is it -- we have to act at once.

   現在是關鍵時刻了，我們得馬上行動。

4. 【口】性感；性交
5. 【美】【俚】笨蛋

pron.

1. used to refer to a thing previously mentioned or easily identified.
   ▸referring to an animal or child of unspecified sex.
2. used to identify a person.
3. used in the normal subject position in statements about time, distance, or weather.
4. used in the normal subject or object position when a more specific subject or object is given later in the sentence.
5. used to emphasize a following part of a sentence.
6. the situation or circumstances.
7. exactly what is needed or desired.
8. informal sexual intercourse or sex appeal.
9. (in children's games) the player who has to catch the others.

n.