His apology rings a little hollow.

他的道歉听上去不太诚恳。

Bamboo is a sort of hollow plant.

竹子是一种中空的植物。

They hollowed out a tunnel through the mountain.

他们挖通了穿山隧道。

The boys scraped out a hollow place for planting trees.

那些孩子挖了个坑准备栽树。

She looked old and thin with sunken cheeks and hollow eyes.

她看上去又老又瘦, 脸颊凹陷, 眼圈发黑。

The stench of cordite and clouds of smoke hung over the hollow.

炸药的恶臭和爆炸硝烟笼罩着山谷。”

The cottage is in that hollow.

村舍在那片洼地。

Woodpeckers inhabit hollow trees.

栖息在中空的树中。

He gave a hollow laugh.

他发出低沉空洞的笑声。

A water pipe is hollow.

水管是空心的。

Flora's laugh hollowed her cheeks.

弗洛拉一笑，双颊就凹陷下去。

The I type shear blocks dowelled bidirectional hollow plates (I SBDBHPs) are the most widely used.

剪力键式双向空心板中的Ⅰ型板（简称Ⅰ型空心板），是该类空心板中使用最多的一种板型。

The rabbit tires and falls, landing inside the hollow trunk of a sycamore tree, where he is trapped.

兔子掉到了一棵无花果树的空树干，挣扎也出不去。

Currently, the products consist of toughened glass, interlayer glass, bulletproof glass, pickproof glass, fireproof glass, hollow glass and hot bending glass.

产品有钢化玻璃，夹层玻璃，防弹防盗玻璃，防火玻璃，中空及热弯玻璃。

A new waterproof and thermal insulation paint made of materials such as elastic emulsion,hollow glass bead,diatomite,infrared reflection agent and amianthus is introduced.

利用弹性乳液、空心玻璃微珠、硅藻土、红外线反射剂、石棉绒等原料制得一种新型防水保温涂料。

Thus a hollow appears on the surface of the nucleus.The precursor of chromatoid body gathered in the hollow and condensed into chromatoid body.

拟染色体前体物质集中于该凹陷中，并聚焦成拟染色体。

Its Hard products is widely used as electric stove hearth sets in lab and wall,suspend ceiling brick,hollow brick,fire bulkhead muffle board,hot dozzle,nozzle etc.

硬质制品用作实验电炉全纤炉膛件及陶瓷窖用墙体、吊顶砖、孔砖、挡火隔焰板、保温帽、口、套等。

I tapped the melon lightly, the way my mother does in the supermarket, listening for the hollow sound of the freshness: Pung, pung.

像母亲在市场挑瓜那样，我也在瓜上轻轻地敲了敲，听面有没有空洞洞的瓜熟的声音。果然传来“砰砰”的回声。

A new fabrication method for hollow microneedle array is proposed with three times exposures in deep X-ray lithography of synchrotron radiation and the development procedure.

摘要提出了一种新的空心微针阵列加工方法，利用三次同步辐射曝光和显影过程来加工微针。

Syconium (syconus) A composite inflorescence or fruit in which the small individual flowers are borne on the inside of a hollow receptacle, as in figs (Ficus).

隐头花序（隐头果）：植物花托膨中空，内部着生小花，这样的复合花序或果实即为隐头花序或隐头果。