Sentence examples for one drop from inspiring English sources

The phrase "one drop" is correct and can be used in written English.
It is often used to refer to a small amount of liquid or substance. Here are some examples: 1. "Be careful not to add too much salt to the soup, just one drop can be enough to ruin the whole dish." 2. "After years of drought, even one drop of rain was a blessing to the parched land." 3. "The pharmacist instructed me to only use one drop of the medication in my eye each day." 4. "In this recipe, you only need one drop of vanilla extract to add a hint of flavor." 5. "The scientist studied the effects of pollution on marine life by measuring the impact of one drop of oil in a large body of water."