Definition
to take advantage of a favorable situation or opportunity while it is available.
打鐵趁熱
The company's stock is cheap right now; we should make hay while the sun shines and buy it.
公司股票現在很便宜；我們應該趁著陽光普照的時候好好利用，買進它。
The weather is so nice; we should make hay while the sun shines and go to the beach.
天氣這麼好；我們應該趁著陽光普照的時候好好利用，去海灘。
This promotion ends today, you'd better make hay while the sun shines and go buy it quickly.
這個促銷今天結束，你最好趁著陽光普照的時候好好利用，趕快去買。