🇬🇧🇨🇳 protocol - 协议 : English Lesson

Meaning of "protocol" ("协议"), detailed definition, and a short video lesson below.

A protocol is a careful set of step‑by‑step rules that tell scientists or doctors exactly what to do in an experiment or medical procedure. It says what to use, how much, in what order, and for how long, so that the experiment is safe, fair, and can be repeated the same way every time.

Watch and listen to this English flashcard to understand the word in more detail, with an easy example sentence.

The slime experiment protocol warned “do not taste,” which means someone definitely tasted it before writing that rule.

The lab’s cookie‑baking protocol failed when someone ate all the test materials.

The protocol for our germ experiment did not include sneezing dramatically on our brothers, but we did it anyway—purely for research.

In our volcano protocol, step one was “put on goggles,” and step two should have been “remove cat from danger zone.”

In real science labs, every experiment needs a written protocol so other scientists can repeat it exactly and double‑check if the discovery is real.

Nurse opened the protocol and read it out loud. The protocol told her to wash, put on gloves, and swab the child's cheek. She followed each protocol step, checked the protocol sheet, and sealed the sample with care. The doctor read the same protocol, nodded, and the child hugged a toy, calm at last.

Learn the meaning of protocol with our educational learning resources. Download a colorful poster, print engaging games, and enjoy an easy story where the word protocol appears in context. 👍

This word is at the C1 level, which means it’s part of advanced English. It’s used in sophisticated conversations, professional settings, and academic discussions. Words at this level help you express yourself fluently and precisely in nuanced situations.

Expanding your English vocabulary is one of the best ways to improve your pronunciation, spelling, and confidence in English. Watch the video above to memorize the word, understand its meaning, and see example sentences in action. Discover related words to grow your vocabulary naturally. Add words to your playlist for stress-free, effective learning—anytime, anywhere! Watch, learn, repeat.