Human Ovarian Epithelian Adenocarcinoma with Subcutaneous Metastasis Established in Murine Model
人卵巢癌裸鼠皮下移植瘤模型的建立

Mechanism of Photosynthetic Characters of Ambrosia Trifida in Competition with Helianthus turberosus
菊芋对三裂叶豚草叶片光合特性的竞争机理

For example, the sunflower belongs to the species Helianthus annuus.
植物得属名和种加词都要用拉丁文和斜体印刷。

the cause taproot of root helianthus ， lateral root and fibrous root composition.
根向日葵的根由主根。侧根和须根组成。

Helianthus sunflower, typical herbaceous dicot stem t. S n.
向日葵, 向日葵属的植物。

any plant of the genus Helianthus having large flower heads with dark disk florets and showy yellow rays.
向日葵属植物，黑色花盘，金黄色放射状花瓣。

Last week I took these pictures of rock rose, helianthemum, in Dorset.
上周我拍了这些沙漠座莲的照片，半日花属，在多塞特。

Investigation on Helianthus tuberosus L. Growing in Sandy Land of the Eastern China.
我国东部沙地菊芋生长的调查研究。

Study on the Structure of Seed Coat of Endangered Plant Helianthemum ordosicum
濒危植物鄂尔多斯半日花种皮结构的研究

Primary Studies on Daily Photosynthetic Changes of Rare and Endangered Plant Helianthemum soongoricm.
珍稀濒危植物半日花光合作用日动态变化的初步研究

This paper has ied the protective methodandthe aboveground exhibition hall design of this famous Baiheliang Ridge.
就此讨论了白鹤梁的保护方式，及其地面陈列馆的设计方案。

Study on Extraction Technology of Yellow Pigment from the Petal of Helianthus annuus L.
向日葵花瓣黄色素提取工艺研究。

A mephistophelian glint in his eye.
他眼睛里露出冷酷的神色。

Is helianthus a medicinal material
向日葵是药材吗？

Helianthus is Van Goghs masterpiece.
向日葵是梵高的代表作。

Its not helianthus. I think its peony and lotus flower.
不会是向日葵，图片上的图案我觉得是缠枝牡丹和缠枝莲。