1, command

spell

Explain oral tasks or orders; Command: Dad ~ Big Brother must come back before the end of the month. Please tell us what to do.

2. Porphyrin

Pinyin [b τ Pinyin]

Explain that organic compounds are an important part of chlorophyll and heme. [British dolphin]

3. Yun Fei

spell

Explain the noise.

Step 4 instruct

spell

Explain dialects. Orders. Sichuan Opera performed "The Adventure of Master Joe": "Listen to my instructions: don't blink or peck when you are sleepy, so as to keep the sedan chair upside down!"

5. Phenazine

spell

The molecular formula is C 12H8N2, which is colorless or yellowish needle-like crystal.

6.thiophene

Pinyin [sāi fēn]

Explain the organic compound, chemical formula C4H4S. Colorless liquid with special smell, soluble in ethanol and ether, insoluble in water. It is a raw material for making dyes, medicines, etc. [English thiophene]