Next, the sinew is laboriously prepared, providing strands of ideal length to cover the back of the bow.

其次，腱子是艰苦准备，提供理想的长链，以支付背面的弓。

youdao

During the two-year "peace process", IWC governments agreed new rules mandating they would strain every sinew to reach consensus where possible, and avoid going back to the years of pointless fractious discord.

BBC: Whaling: Chaos or compromise?