---
id: 607299f24a43744eca51b14a
title: Task 25
challengeType: 22
dashedName: task-25
lang: zh-CN
inputType: pinyin-to-hanzi
---

<!-- (Audio) Li Hong: 轮询 (lún xún) -->

# --description--

In this lesson, you'll practice using `uen` and `ün` to form a word.

When you need to check something again and again at regular intervals instead of just once, this word is often used in that situation.

# --instructions--

Listen to the audio and complete the word below. The correct syllables will be converted to Chinese characters.

# --fillInTheBlank--

## --sentence--

`BLANK`

## --blanks--

`轮询 (lún xún)`

### --feedback--

This word combines the syllables `lún` and `xún`.

# --explanation--

The first syllable combines the initial `l` with the final `uen` (written as `un`), and uses the second tone, which rises from mid to high. The second syllable combines the initial `x` with the final `ün` (written as `xun` in Pinyin), and also uses the second tone.

`轮询 (lún xún)` refers to a method where a system periodically checks for new data or status changes instead of relying on event-driven notifications.

# --scene--

```json
{
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    "background": "cafe.png",
    "characters": [
      {
        "character": "Li Hong",
        "position": {
          "x": 50,
          "y": 15,
          "z": 1.4
        },
        "opacity": 0
      }
    ],
    "audio": {
      "filename": "ZH_A1_pinyin_nasal_finals.mp3",
      "startTime": 1,
      "startTimestamp": 370.97,
      "finishTimestamp": 373.41
    }
  },
  "commands": [
    {
      "character": "Li Hong",
      "opacity": 1,
      "startTime": 0
    },
    {
      "character": "Li Hong",
      "startTime": 1,
      "finishTime": 2.94,
      "dialogue": {
        "text": "轮询 (lún xún)",
        "align": "center"
      }
    },
    {
      "character": "Li Hong",
      "opacity": 0,
      "startTime": 3.44
    }
  ]
}
```
