heliotropism

heliotropism的音标是[ˌhiːliəʊtrəʊˈpɪzmɪs]，意思是“向日性；向光性”。速记技巧是：helio（太阳）+ topsy（旋转）+ -ism（行为）→向日性。

Heliotropism这个词源于希腊语，意为“向阳光运动”。其词源中的helio-表示“太阳”，-trop-表示“走向”。

变化形式：词形一般为复数形式，如heliotropes。

相关单词：

1. phototropism（向光性）：这个词源于希腊语中的photo-（光）和-trop-（走向），意为向光运动。

2. gravitropism（重力学）：这个词源于希腊语中的gravit-（重力）和-trop-（走向），意为对重力的定向运动。

3. thermotropism（热力学）：这个词源于希腊语中的thermo-（热）和-trop-（走向），意为对热的定向运动。

4. chemotropism（化学趋向性）：这个词源于希腊语中的chemo-（化学）和-trop-（走向），意为对化学物质的定向运动。

5. magnetotropism（磁力学）：这个词源于希腊语中的magneto-（磁）和-trop-（走向），意为对磁力的定向运动。

以上这些词都与heliotropism一样，描述了生物或物体对环境刺激的定向运动或反应。这些词的出现和发展，反映了人类对自然世界的深入理解和探索。

heliotropism常用短语：

1. phototropism in plants

2. gravitropism

3. temperature heliotropism

4. light heliotropism

5. gravity heliotropism

6. chemotropism

7. magnetic heliotropism

双语例句：

1. The plant exhibits phototropism and gravitropism.

该植物表现出趋光性和向地性。

2. The plant exhibits temperature heliotropism, which means it will grow towards the sun when it is warm and towards shade when it is cold.

该植物表现出温度趋光性，也就是说，当天气温暖时，它会向着阳光生长；当天气寒冷时，它会向着阴凉处生长。

3. The plant"s response to light is called phototropism, and its response to gravity is called gravitropism.

植物对光的反应被称为趋光性，而对重力的反应被称为向地性。

英文小作文：

Heliotropism is a fascinating phenomenon that occurs in plants and animals. It refers to the ability of organisms to respond to external stimuli, such as light, gravity, temperature, and chemicals, and adapt their growth and behavior accordingly.

For instance, plants exhibit phototropism, which means they grow towards the light source, and gravitropism, which means they bend towards the ground when they are heavy with water or nutrients.

Similarly, animals exhibit chemotropism, which means they respond to chemical signals and adapt their behavior accordingly.

Heliotropism plays an important role in the survival of organisms and their adaptation to their environment. It helps organisms find food, water, and shelter, and enables them to avoid predators and other dangers. Understanding this phenomenon can help us better understand life on Earth and its complex interactions between living beings.