由于交通堵塞，我们不得不绕开市中心走另一条路。

Because of the traffic jam, we had to ___by-pass the city center and take another route.

新修建的绕城公路大大减少了市中心的拥堵。

The new ___by-pass has significantly reduced traffic congestion in the city center.

医生建议他做心脏搭桥手术来改善血液循环。

The doctor recommended a heart ___bypass surgery to improve his blood circulation.