a new strain of wheat的用法和样例：
- He created a new strain of sheep.
- Any flu epidemic is worrisome, especially when a new strain of flu bug is involved.
- Tzu Chi volunteers are donating Burmese farmers a new strain of seeds which take shorter time to harvest.
- The Overmind created a new strain of Zerg that could facilitate the communication of its whims.
- Naturalization of a new culture is always faster among the young.