It is difficult to build a dam in the sea, and the cost is very high.

在海里建水坝十分困难，成本也很高。

youdao

The authors determined that Miyatoko Dam (see Figure 10), a 48m (157ft) high RCC dam was located approximately 13km (8 miles) north of Sendai.

作者肯定地说，高48米的滚筒实压混凝土宫北大坝（见图10）大约在千代以北13公里。

youdao

Two other concrete gravity DAMS, the 73.5m (341ft) high Sugesawa dam and the 14m (46ft) high Uh DAMS were also located close to the earthquake epicenter.

另外两座混凝土重火力大坝，73.5米高的茂泽大坝和14米高的乌赫大坝也位于震中附近。

youdao

Men who worked at night on the dam suffered less, but the heat was still as high as thirty degrees Celsius.

VOA: special.2009.08.12

Today,visitors can see a statue of the men who worked as high scalers to build Hoover Dam.

VOA: special.2009.08.12

Workers called "high scalers" were some of the first to begin building the dam.

VOA: special.2009.08.12

Or take the Aswan High Dam in Egypt, an unmitigated disaster, according to ecologists.

FORBES: The Story Of Eau

Built in 1837, the 24-foot high dam was used to accommodate barges and power sawmills.

CNN: Study opens floodgates on dam removal

Mr Turner said the council had also built a 1m high dam near the culvert, which had improved water flow through the area.

BBC: Divers used to investigate flood-hit A34 in Stone