pyrethrum flowers造句

例句与造句

1. The company produced pyrethrin insecticides but force to close in mid-1960 with government restrictions on the importing of pyrethrum flowers.
2. Local officials cite Suffolk County's policy of augmenting larvicides with the pesticide resmethrin, derived from the pyrethrum flower, as evidence that sprays can be safe.
3. The young boy looked askance at what his first day's work was worth : three cents for the long hours he spent picking pyrethrum flowers used to make insecticide.
4. The Carrs settled in the Belgian Congo in 1949, and after their divorce Rosamond settled in Mugongo, Rwanda to run a plantation growing pyrethrum flowers to produce pyrethrin, an organic insecticide sought the world over.
5. There, in the village of Mugongo, 12 miles northwest ov asenyi, she oversaw a staff of nearly 300 people and constantly chased away the elephants who grazed on the white pyrethrum flowers and later the flowers she grew for export.
6. It's difficult to find pyrethrum flowers in a sentence. 用pyrethrum flowers造句挺难的