An arrow with a four-edged head is shot from a crossbow.

有四面刃头的箭是从石弓发出来的。

The tetrasporophyte wrapped by callose is of simultaneous type.

四分体呈四面体型，被胼胝质壁所包围。

He rushed into the midst of the hooligans and laid about him fearlessly.

他冲到那群恶棍中间,毫无畏惧地向四面八方乱打。

We should encircle the enemy forces completely and let none escape from the net.

我们应该四面包围敌不漏网。

The small country has no seacoast, but is locked in by other nations.

这个国没有海岸, 四面是他国家。

Waves hit the toat from all sides.

海浪从四面八方冲击着。

People converged on the political meeting from all parts of the city.

们从城市的四面八方涌向这次政治集会。

The marchers came from all quarters.

游行者来自四面八方。

.. One, the Oceania that Australia of Australian nature general situation is located in the Southern Hemisphere, seagirt.

、澳大利亚自然概况澳大利亚地处南半球的大洋洲，四面环海。

Pollen mother cells undergo meioses through simultaneous cytokinesis and give rise to tetrads of microspores, which are tetrahedrally arranged.

花粉母细胞行减数分裂，细胞质分裂属同时型，产生孢子四分体，为四面体形。

Ubisch bodies and lipid bodies are found in the glandular tapetums. In meiosis of microsporocyte, cytokinesisis is a simultaneous type, which produces an isobilateral tetrad.

孢子母细胞减数分裂胞质分裂为同时型,产生正四面体型四分体。

Except on the crown, which was raggedly bald, he had stiff black hair, standing jaggedly all over it, and growing down hill almost to his broad, blunt nose.

他的头顶已秃，只剩下几根乱发。秃得乱七八糟的头顶周围的头发却长得又黑又硬，向四面支棱开，又顺着前额往下长，几乎到了那宽阔扁平的鼻子面前。

East Mount Dongting is a byland, west part of Mount Dongting is an island in lake surrounded by water.The area is famous for tea and fruit in our country.

洞庭东山为半岛，西山是四面环水的湖岛，是我国著名的茶、果间作区。